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Old 07-30-2018, 12:41 AM   #1
Roadster62
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Default Priming & painting a 35-40 frame

If all goes well I should have my frame sandblasted next month, any tips on getting full coverage of primer and paint inside the original boxing plates? This is my first 35-40 frame. Thanks. Bob
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Old 07-30-2018, 07:52 AM   #2
19Fordy
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Default Re: Priming & painting a 35-40 frame

Use a plastic spray bottle to get paint into all those tight fitting plates,
corners where frame members meet. Wipe off any drips,if desired.
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Old 07-30-2018, 08:08 AM   #3
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Default Re: Priming & painting a 35-40 frame

This may not be for restoration purists but I used Rust-Oleum rusty metal primer then either satin or gloss black. I used spray cans for the hard to reach areas like where the X meets the frame rails, and did not spare the paint, and brushed the rest if the areas. Same again with the black paint. For all of the visible areas say in the engine compartment I sanded the surfaces to get them smooth and top/final coated them by spraying. My old black 40 coupe was done this way, my old Gibbon bodied 39 cabriolet, my avatar, and others. More recently I have used KBS Coatings and you can look up their properties on line. Very nice stuff but it does have its own peculiarities and is not quite the same as paint. Either way you will have a very durable coating to last a very long time.
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Old 07-30-2018, 08:20 AM   #4
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Default Re: Priming & painting a 35-40 frame

I've used POR-15 and brushed it on. When it dries it looks like it was sprayed. For the real tough spots you can use a rattle can after the POR-15 has dried. I forgot to add you can stand the frame on end and the POR-15 will run into the crevices and seal off any residual rust.

Last edited by TJ; 07-30-2018 at 11:16 AM. Reason: add info
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Old 07-30-2018, 09:25 AM   #5
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Default Re: Priming & painting a 35-40 frame

As these frames are subject to rust between the two rails, does anyone disassemble their frame, clean/ paint, then re- rivet back together?
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Old 07-30-2018, 09:28 AM   #6
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Default Re: Priming & painting a 35-40 frame

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As these frames are subject to rust between the two rails, does anyone disassemble their frame, clean/ paint, then re- rivet back together?
Yep, that is the only way to clean up the space between the rails as far as I know. At least that is what I have done.
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Old 07-30-2018, 09:32 AM   #7
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Default Re: Priming & painting a 35-40 frame

my frame has been painted for over 25 years with rustoleum satin black, first sandblasted, then primed with red restoleum primer thinned out with lacquer thinner, it really soaks into the crevises. do not use paint thinner, use an enamel reducer for the satin black. my formula for black was one quart flat, 4 qts gloss--used this before satin was widely available. still holding up good, a lot of mile on the wagon!
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Old 07-30-2018, 09:42 AM   #8
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Default Re: Priming & painting a 35-40 frame

I adjust the nozzle of my gun so the "spray" is less a mist and more of a "squirt". Once those crevasses are covered nicely, I readjust to a proper mist.

If you are seeking a proper (authentic) restoration, the frames were gloss black.
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Old 07-30-2018, 03:26 PM   #9
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Default Re: Priming & painting a 35-40 frame

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As these frames are subject to rust between the two rails, does anyone disassemble their frame, clean/ paint, then re- rivet back together?
that sounds like a nightmare project
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Old 07-30-2018, 03:46 PM   #10
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Default Re: Priming & painting a 35-40 frame

Cant say I have done this but what about tapeing the running board holes up or use rubber plugs ,create a dam at the ends with bondo with a release agent. then stand the frame on edge and swill a gallon or so of black paint back and forth, lay a sheet of plastic down first Ted
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Old 07-30-2018, 03:47 PM   #11
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Default Re: Priming & painting a 35-40 frame

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that sounds like a nightmare project
Not really, just have to drill all of the rivets out.
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Old 07-30-2018, 04:01 PM   #12
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Default Re: Priming & painting a 35-40 frame

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As these frames are subject to rust between the two rails, does anyone disassemble their frame, clean/ paint, then re- rivet back together?
There have been two to date that I could not replace so I had to disassemble them partially. It really isn't as bad as it may seem to many folks.
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Old 07-30-2018, 04:38 PM   #13
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Default Re: Priming & painting a 35-40 frame

I rented a big sandblaster and went to work. I feel it was worth the effort.

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Old 07-30-2018, 06:16 PM   #14
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I rented a big sandblaster and went to work. I feel it was worth the effort.

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Old 07-30-2018, 06:32 PM   #15
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Default Re: Priming & painting a 35-40 frame

My hat is off to those of you who are "rivet removers".
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Old 07-30-2018, 06:49 PM   #16
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My hat is off to those of you who are "rivet removers".
boy you got that right. maybe different tools, but this is usually goes for me. . . (boy, that came out horrible)

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Old 07-30-2018, 07:14 PM   #17
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Default Re: Priming & painting a 35-40 frame

No torches involved in any I have done. You drill the rivet heads off and they punch out. Not sure why it is believe to be that big a deal. I wouldn't to do in on a fairly rust free frame, but on a frame that has been out in the open for some time it may need to be cleaned between the rails (if removing the rust is a concern).
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Old 07-30-2018, 07:27 PM   #18
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Default Re: Priming & painting a 35-40 frame

Hi; I had two frames dipped at $450 each. After neutralizing the Co. dipped the frames in 'Osfo', a corrosion preventer/converter. Anyway very nice expensive result. Newc
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Old 07-30-2018, 07:27 PM   #19
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Default Re: Priming & painting a 35-40 frame

I have done this to other frames, the Rivet to do drill out pretty easy. Of course on a 35 to 40 frame I would put it in a frame jig before and after to ensure it stays straight.
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Old 07-30-2018, 08:27 PM   #20
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Default Re: Priming & painting a 35-40 frame

I can't believe how many hours I spent measuring, re-measuring, diagonals, leveling, re-level then re-measure, on and on. It was like a giant puzzle and I really did enjoy the challenge.

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Old 07-30-2018, 09:13 PM   #21
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Default Re: Priming & painting a 35-40 frame

I put a 4 link rear end on my 56 f100 and drilling out the old hangers was a pain in the butt! even when you center punch them the drill would wonder, making a nice keyhole mess. granted some were not a problem, but most just fought me. re-sharping drill bits. working upside down. I don't want to have to do much more of that. I could see frame re-alinement being a pain too. the acid dip sounds good though.
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Old 07-30-2018, 11:26 PM   #22
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Default Re: Priming & painting a 35-40 frame

Thanks for all the info so far, my frame is so nice it could go out for chrome if there are tanks large enough. Step one is welding up adaptors to fit it in two engine stands so I can spin it and clean it, then get the sand out and primer & paint in. the outside isn't any problem. It is so awkward compared to a Model A or '32 frame. Bob
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Old 07-31-2018, 09:57 AM   #23
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Default Re: Priming & painting a 35-40 frame

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I put a 4 link rear end on my 56 f100 and drilling out the old hangers was a pain in the butt! even when you center punch them the drill would wonder, making a nice keyhole mess. granted some were not a problem, but most just fought me. re-sharping drill bits. working upside down. I don't want to have to do much more of that. I could see frame re-alinement being a pain too. the acid dip sounds good though.
I know I'm beating a dead horse here, but there is a BIG difference between working under a car and attempting to drill something at strange angles (been there, done that) and working on a bare frame out in the open where you have good access.
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Old 07-31-2018, 02:16 PM   #24
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I know I'm beating a dead horse here, but there is a BIG difference between working under a car and attempting to drill something at strange angles (been there, done that) and working on a bare frame out in the open where you have good access.
yep. my 56 was still a truck. I didn't break it down and could put it on saw-horses. those rivets came to a peak so the drill wouldn't want to stay put. and depending how the hot rivet was installed, it could be slumped to one side not showing it's true center! nothing like hot metal shavings in your hair and face.
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Old 08-01-2018, 12:49 PM   #25
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Default Re: Priming & painting a 35-40 frame

For the dip process. Are we talking just rust prevention or paint as well?
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Old 08-01-2018, 05:03 PM   #26
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yep. my 56 was still a truck. I didn't break it down and could put it on saw-horses. those rivets came to a peak so the drill wouldn't want to stay put. and depending how the hot rivet was installed, it could be slumped to one side not showing it's true center! nothing like hot metal shavings in your hair and face.
Best way I found for those rivets is to grind them down till you get a flat surface, then centerpunch and drill.
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Old 08-01-2018, 05:04 PM   #27
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Best way I found for those rivets is to grind them down till you get a flat surface, then centerpunch and drill.
Yep, that's the procedure I use.
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Old 08-01-2018, 09:50 PM   #28
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Default Re: Priming & painting a 35-40 frame

never done a v8 frame, but have done several A and T frames. getting them apart, not so bad, but my rivet jobs never look like henry's when i put them back together. i have the correct tool and a good air hammer, takes two people, and you gotta be fast or the rivet cools, and they still look like hell, and some end up loose and need to be redone. then, theres the hard to get ones around the cross members that i'm sure ford had a nice special tool to do. its a lot of work, but on the v8 frames that are double wall i can see it being the proper way, especially if you live in a swamp like me
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Old 08-01-2018, 10:10 PM   #29
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Default Re: Priming & painting a 35-40 frame

After I had my '40 frame dipped and all the rust removed, I took it to a galvanizer who dipped the entire frame and galvanized it. They let me watch the whole process. I then primed it with PPG DP40 which will adhere to galvanized steel.
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Old 08-02-2018, 05:45 PM   #30
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Default Re: Priming & painting a 35-40 frame

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Step one is welding up adaptors to fit it in two engine stands Bob
Didn't think engine stands were tall enough to spin one of those frames; at least mine weren't. Made a taller set of stands a while back, gotten quite a bit of use here and at my kids.
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Old 08-02-2018, 10:12 PM   #31
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Default Re: Priming & painting a 35-40 frame

The last frame I painted I used "Chassis Saver" as recommended by another Fordbarn member. Worked very well for me.

http://www.magnetpaints.com/underbody.asp
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Old 08-03-2018, 08:09 AM   #32
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Default Re: Priming & painting a 35-40 frame

I found the titanium step drill (item # 69088) from HF works pretty well for drilling frame rivets.
I think the first step size is 1/8 inch on the smaller step drill.

Must be something about the cutting surface angle versus a standard drill.
Difficult to break these as well.

An accurate center punch location is a given.
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Old 08-03-2018, 02:21 PM   #33
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Default Re: Priming & painting a 35-40 frame

I've found that if I grind a flat on the rivet head, center punch it, drill down with a 3/16" or so bit, then drill a 5/16" hole about the depth of the head, knock the head off with chisel, go back to the small drill and go to a depth of the first layer and half thru the last, open that hole with as large a bit as your centering allows, and then knock it out with a punch.

Many times the rivet is swelled or even bulged between layers, this way the walls are reduced and the punch draws the rivet out.

It also helps to clamp next to the rivet with vise grip so the inner isn't deformed when punching the rivet out.

I usually grind all the rivets, then center punch them all, etc; kinda like an assembly line.

Good drill bits and a little care make this actually a pretty easy process; whether you are taking off a spring hanger, cross-member, or a complete frame.
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