The Ford Barn

Lamar Green · 06-12-2022, 10:16 PM

My hood paint is bubbling up. I noticed the paint is also flaking off underneath the hood I suppose due to the heat off the motor.

Any ideas on what to apply underside of the hood to hold down the heat from making the exterior on the hood paint bubble up?

mass A man · 06-13-2022, 12:24 AM

Sorry to say I think your hood will need to be stripped, prepped correctly and repainted. Something went wrong during the paint job, hopefully only the hood. I've never seen a Model A hood get hot enough to affect the paint. Your Ford has the original motor?

chrs1961815 · 06-13-2022, 08:11 AM

The engine would blow up long before the hood would even get hot enough to bubble paint. Never even seen one too warm to touch. The louvers in the side help a lot.
Most likely bad body work where somebody did something they weren't supposed to do. Likely applying material over moisture or rust. Seen it a million times.

old ugly · 06-13-2022, 09:46 AM

the problem could be paint quality, primer quality, prep problem (adhesion).
you don't need to coat the inside of the hood to suppress the heat, the paint should be ok those temperatures if properly refinished.
if its bubbling now its time to refinish the hood, of live with it.

edit
it could also be a body filler issue, if there is some in that area.
pictures???

Anteek29 · 06-13-2022, 10:15 AM

How long ago was the hood painted?

gdmn852 · 06-13-2022, 12:49 PM

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Hello,”bubbles “ I have seen in paint seem to usually come from water contamination from the air compressor,if in primer coat reacts with steel to cause rust or if trapped in finish coat will also be blisters underneath. The only way to fix this is strip to bare metal and refinish.A good set of dryers in-line with air lines and a dead leg for water trap also helps , epoxy base coat is usually a good start when refinishing.

06-12-2022, 10:16 PM	#1
Lamar Green Junior Member Join Date: May 2022 Posts: 10	Hood Paint Bubbles My hood paint is bubbling up. I noticed the paint is also flaking off underneath the hood I suppose due to the heat off the motor. Any ideas on what to apply underside of the hood to hold down the heat from making the exterior on the hood paint bubble up?

06-13-2022, 12:24 AM	#2
mass A man Senior Member Join Date: Jun 2010 Location: Danvers, Ma. Posts: 712	Re: Hood Paint Bubbles Sorry to say I think your hood will need to be stripped, prepped correctly and repainted. Something went wrong during the paint job, hopefully only the hood. I've never seen a Model A hood get hot enough to affect the paint. Your Ford has the original motor?

06-13-2022, 08:11 AM	#3
chrs1961815 Senior Member Join Date: Jul 2018 Location: Spring Grove, Illinois Posts: 1,371	Re: Hood Paint Bubbles The engine would blow up long before the hood would even get hot enough to bubble paint. Never even seen one too warm to touch. The louvers in the side help a lot. Most likely bad body work where somebody did something they weren't supposed to do. Likely applying material over moisture or rust. Seen it a million times. __________________ "The more things change, the more they stay the same."

06-13-2022, 09:46 AM	#4
old ugly Senior Member Join Date: Aug 2021 Location: alberta canada Posts: 585	Re: Hood Paint Bubbles the problem could be paint quality, primer quality, prep problem (adhesion). you don't need to coat the inside of the hood to suppress the heat, the paint should be ok those temperatures if properly refinished. if its bubbling now its time to refinish the hood, of live with it. edit it could also be a body filler issue, if there is some in that area. pictures??? __________________ old ugly my old father-in-law told me. "listen close when people tell you how to do stuff they may know something. then do it the way you want."

06-13-2022, 10:15 AM	#5
Anteek29 Senior Member Join Date: Dec 2014 Location: Santa Maria, CA Posts: 985	Re: Hood Paint Bubbles How long ago was the hood painted? __________________ Alan 1929 Special Coupe 1941 Pick-Up 1955 Victoria

06-13-2022, 12:49 PM	#6
gdmn852 Senior Member Join Date: Feb 2019 Location: Erie Pa Posts: 691	Re: Hood Paint Bubbles Sponsored Links (Register now to hide all advertisements) Hello,”bubbles “ I have seen in paint seem to usually come from water contamination from the air compressor,if in primer coat reacts with steel to cause rust or if trapped in finish coat will also be blisters underneath. The only way to fix this is strip to bare metal and refinish.A good set of dryers in-line with air lines and a dead leg for water trap also helps , epoxy base coat is usually a good start when refinishing.