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Old 06-21-2019, 11:40 AM   #1
mrtexas
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Default Preserving left over urethane paint

Opened a can of left over bambalino blue Restoration Shop urethane paint from my 36 woodie yesterday. I had filled the gallon can which was half full with wire feed welding gas. Sure enough there was no hardened layer of paint on the surface. It looked like I had just opened a new can of paint. Anyone else try this?
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Old 06-21-2019, 11:47 AM   #2
J Franklin
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Default Re: Preserving left over urethane paint

A trick I use is to store used paint in cans upside down, it seems to work.
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Old 06-21-2019, 12:30 PM   #3
Bill
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Default Re: Preserving left over urethane paint

Just wondering what process you used to add the welding gas? Kind of reminds me of when I first started to work in a bodyshop. The boss told me to get him a bucket of compressed air...Sorry, I couldn't resist the comparison.. Bill
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Old 06-21-2019, 02:23 PM   #4
Michael Allen
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Default Re: Preserving left over urethane paint

Is this "urethane" a two component (2K) product (needs hardener) or a one component (1K)? A 2K typically will not form a film inside a sealed container since the hardener (once added) produces the cure. I've stored both pigmented and clear 2K urethane for 15 or so years with no effect except clear may be slightly yellower than when new. The hardener is what can go bad. Hardener is packaged in an envelope of inert gas to keep moisture away. Once opened humid air enters and can slowly react with the isocyanate and become "seedy" or completely solidify.
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Old 06-21-2019, 03:06 PM   #5
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Default Re: Preserving left over urethane paint

Glass marbles....
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Old 06-21-2019, 04:03 PM   #6
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Default Re: Preserving left over urethane paint

You can also store the paint in a refrigerator but not freezing it.
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Old 06-21-2019, 06:26 PM   #7
51 MERC-CT
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Default Re: Preserving left over urethane paint

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You can also store the paint in a refrigerator but not freezing it.
Vic
Ya! guess that in Alaska you put it in the refrigerator to keep it warm.
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Old 06-21-2019, 06:48 PM   #8
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Default Re: Preserving left over urethane paint

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Ya! guess that in Alaska you put it in the refrigerator to keep it warm.
It hit 85 in Fairbanks today!
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Old 06-21-2019, 07:28 PM   #9
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Default Re: Preserving left over urethane paint

For 60 years (I am 80) I have always flooded paint, varnish, urethane cans with my propane torch gas and then quickly put the lid on. Never a skin. Latex paint doesn't need it.
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Old 06-22-2019, 01:00 AM   #10
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Default Re: Preserving left over urethane paint

Correction. It got 90 to degrees in Fairbanks today. You are correct. We sometimes put stuff in the refrigerator to prevent from freezing.
Vic

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Old 06-22-2019, 03:23 AM   #11
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Default Re: Preserving left over urethane paint

huge fart.
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Old 06-22-2019, 09:46 AM   #12
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Default Re: Preserving left over urethane paint

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It hit 85 in Fairbanks today!
All I know is it was miserable working in the heat! I canít believe I grew up in south Texas, I canít stand the heat anymore! Give me 35-40 degrees and Iím comfortable.

Back on paint, I have put Saran Wrap over the can, then put the lid on. Works good, especially for POR.
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Old 06-22-2019, 10:14 AM   #13
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Default Re: Preserving left over urethane paint

Regarding, "Back on paint, I have put Saran Wrap over the can, then put the lid on. Works good, especially for POR."


I've used screw lid mason jars, putting a double film of Saran Wrap over the opening before closing. After about a year or so though, it still gets hard especially if the jar is only filled part way. Maybe I'll try propane gas next time. Seems like a good idea.
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Old 06-22-2019, 10:50 AM   #14
J Franklin
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Default Re: Preserving left over urethane paint

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Originally Posted by Vics Stuff View Post
You can also store the paint in a refrigerator but not freezing it.
Vic
I do this if I have mixed too much catalyzed paint. It keeps it from hardening and it is usable for maybe a month.
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Old 06-22-2019, 11:37 AM   #15
Fortunateson
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Default Re: Preserving left over urethane paint

Mig gas works great, never a problem. But in some situations I'll food wrap it as well.
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Old 06-22-2019, 04:31 PM   #16
mrtexas
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Default Re: Preserving left over urethane paint

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Originally Posted by oldford2 View Post
For 60 years (I am 80) I have always flooded paint, varnish, urethane cans with my propane torch gas and then quickly put the lid on. Never a skin. Latex paint doesn't need it.
I take it you don't smoke? Boom!
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Palindromes:
Do geese see God?
Was it a car or a cat I saw?
Won't Neil call a Walla Walla client now?
Dr. Gong! Get ale to my motel Ė at Egg-nog Rd!

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Old 06-22-2019, 08:11 PM   #17
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Default Re: Preserving left over urethane paint

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I take it you don't smoke? Boom!
How do you think he got to be 80?
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Old 06-23-2019, 10:15 PM   #18
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Default Re: Preserving left over urethane paint

when I bought our '41 ford in' 94 it was painted with original Lochaven Green. I bought a gallon of single stage about '95 or '96 and I still have it. In fact I used some about a month ago. Is perfectly fine
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