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Old May 08, 2004, 10:09 AM
Giddy up!
Sal C's Avatar
Woodridge, Illinois
Joined May 2000
4,478 Posts
Has anyone ever "baked" on a paint job?

I figured this would be best discussed in scale.

Has anyone ever baked on a paint job by putting the model in an oven? Enamel should be much tougher if baked on. A friend said he's done it before at ~200 degf. Would it do anything to the wood? I'm talking about a balsa plane that's glassed...

Thanks.
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Old May 08, 2004, 10:50 AM
Turrets Syndrome?
Bomberguy's Avatar
Marina Del Rey California
Joined Dec 2003
1,543 Posts
I have accelerated the cure of epoxy/glass in the oven at 150F with no ill effects, but never 200F. You could always make a sample and try it.
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Old May 08, 2004, 10:56 AM
Now in TN!
J Morgan's Avatar
Chapel Hill, TN USA
Joined Apr 2001
24,328 Posts
I sometimes set mine out in the Wyoming sun( and it's warm at 4500'). Speeds up the drying and doesn't seem to hurt.

J
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Old May 08, 2004, 05:33 PM
Registered User
Ravenna,Nbraska
Joined Sep 2003
1,427 Posts
John..
With the winds we get this side of the Divide, are you sure maybe you aren't benifitting from a supercharged airdry....LOL
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Old May 08, 2004, 09:25 PM
Now in TN!
J Morgan's Avatar
Chapel Hill, TN USA
Joined Apr 2001
24,328 Posts
That's true. Alot of times when I'm painting small parts, I'll take them outside and hold tham in the wind and sun. Ready for another coat of acrylic in just a few moments!

J
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Old May 09, 2004, 06:53 AM
AndyKunz's Avatar
Illinois
Joined Sep 2001
23,446 Posts
Sounds like a fun experiment.

Andy
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Old May 20, 2004, 12:21 PM
Registered User
Mid-Michigan
Joined Aug 2002
2,178 Posts
Read up on the specific paint you intend to use. Many years ago I worked building a complicated, low-production scientific instrument, and our engineer decided to use a bake enamel for toughness on the front panels. WHAT a pain! I learned that some enamels ARE formulated to be baked, and some are not!
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Old May 20, 2004, 09:17 PM
Big gov never Works
St. Martin's Avatar
Skunk Water, Rhode Island
Joined Jul 2002
12,323 Posts
Why not build a booth as in full sized auto's use. Then use lightbulbs for the heat source. Lining the booth with alum. foil, shiny side out, would allow better radiation/retention. The booth sized to hold the assemblies with ample clearance. Foam my be a good building material. It could also be made collapsable

I"ll have to give this some consideration.

Steve
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Old May 20, 2004, 10:19 PM
Boffin
rpage53's Avatar
Victoria, BC, Canada
Joined Apr 2001
3,397 Posts
It depends what kind of paint you use. Alkyd enamel is strengthened if baked at 200-250oF. Acrylic/latex enamel would probably be damaged.
The wood shouldn't be affected because it was already kiln dried. I wouldn't do it in an oven that will be used for food. You never really know what's in a paint.

Rick.
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Old May 21, 2004, 12:27 AM
Big gov never Works
St. Martin's Avatar
Skunk Water, Rhode Island
Joined Jul 2002
12,323 Posts
Of course, to high heat could cause different expansions of the wood vs. the finish. Not sure of the values of either, as to which would expand more, or the percentages of expansion. I would play it safer at a lower heat, for modeling purposes.

And the glue joints may suffer if the type is not considered. Also the american Ryan kits have foam cores. These are sure to swell, as air is part of their medium.

Steve
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Old May 21, 2004, 08:06 AM
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Mid-Michigan
Joined Aug 2002
2,178 Posts
Rick as usual brings the actinic light of genuine expertise to the subject that I only see thru a glass darkly.

Another thing - the coating thickness of the enamels I was using was .003 - .005 inch. Heavy!
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