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#962743 - 03/30/11 08:18 PM Paint curing - Air dry vs heat lamps
Neil Offline
I Live Here

Registered: 01/19/03
Posts: 11760
Loc: Eagle, Idaho
Does curing urethane paint with lamps help make the paint any more durable, or is the only benefit faster drying times for production purposes?

I have a set of steel mopar wheels that need painted body color on the outside and was curious if it's worth it to pay a shop to bake them or just let them cure on their own.

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#962744 - 03/30/11 08:48 PM Re: Paint curing - Air dry vs heat lamps [Re: Neil]
ahy Offline
master

Registered: 01/22/07
Posts: 7192
Loc: IN
Time and a couple sunny Idaho days should cure it well. The lamps will just speed the process I think. Urethane (two part I assume) gets hard pretty fast so it shouldn't be excessivly tender after 2-3 days of air curing.

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#962745 - 03/30/11 10:00 PM Re: Paint curing - Air dry vs heat lamps [Re: Neil]
keith airgrabber Offline
Right in the Nutz!!!

Registered: 09/07/08
Posts: 419
Loc: wisconsin united states
Baking the paint will actually make it die back and not look as glassy. It is better to always let it dry naturally when you can. It will harden the same either way. I am a master painter and painting is my job. When I paint a car at the end of the day. I will let it air dry overnight. Alot nicer results. Baking paint is only for production purposes. So you can paint multiple cars in a day ,instead of just one.


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#962746 - 03/30/11 10:03 PM Re: Paint curing - Air dry vs heat lamps [Re: keith airgrabber]
herkamer Offline
pro stock

Registered: 10/15/05
Posts: 1301
Loc: Lakewood, Colorado
Urethanes dry by 2 different methods. One is solvent evaporation and the other is cross-linking of the catalyzed components. Baking is purely for production. A few sunny warm days will do the trick.
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#962747 - 03/30/11 10:06 PM Re: Paint curing - Air dry vs heat lamps [Re: keith airgrabber]
Neil Offline
I Live Here

Registered: 01/19/03
Posts: 11760
Loc: Eagle, Idaho
Thanks for the replies.

I'll just paint them myself when it warms up enough. We are in the 50's and 60's, but it keeps getting cloudy and raining every other day. As soon as we get a warm and dry streak going I'll give it a shot.

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#962748 - 03/30/11 10:07 PM Re: Paint curing - Air dry vs heat lamps [Re: keith airgrabber]
RapidRobert Offline
Circle Track

Registered: 11/20/03
Posts: 31655
Loc: Lincoln Nebraska
Quote:

I am a master painter Baking paint is only for production purposes.


Ahhh I always thought the bulbs in a paint booth were to harden the paint & obviously they would dry it faster. Deciding whether to try barbeque grill paint or have some headers chromed. Not so concerned about looks as I am about staving off them rusting out
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#962749 - 03/30/11 10:59 PM Re: Paint curing - Air dry vs heat lamps [Re: RapidRobert]
hooziewhatsit Offline
master

Registered: 10/05/07
Posts: 2512
Loc: State of Jefferson
All that being said, I've baked a few things now, and they turned out much better than they would air drying. Granted, it is winter, so it would otherwise take a couple weeks to cure

Hopefully my future garage will have room for a $20 craiglist oven so I can bake things and have them done now.
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#962750 - 03/30/11 11:02 PM Re: Paint curing - Air dry vs heat lamps [Re: Neil]
OzHemi Offline
Penguin-hating Ginger

Registered: 01/19/03
Posts: 104346
Loc: Garden Grove, CA
Quote:

We are in the 50's and 60's, but it keeps getting cloudy and raining every other day





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#962751 - 03/30/11 11:48 PM Re: Paint curing - Air dry vs heat lamps [Re: Neil]
elitecustombody Offline
pro stock

Registered: 12/28/07
Posts: 1572
Loc: Jacksonville Florida
Just paint and let them air dry, cooking paint won't make it any more durable
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#962752 - 03/30/11 11:56 PM Re: Paint curing - Air dry vs heat lamps [Re: elitecustombody]
RapidRobert Offline
Circle Track

Registered: 11/20/03
Posts: 31655
Loc: Lincoln Nebraska
Quote:

Just paint and let them air dry, cooking paint won't make it any more durable


got it and that concept had been entrenched in my brain for decades
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