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Old May 08, 2004, 11:09 AM
Sal C is offline
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Giddy up!
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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, 11:50 AM
Bomberguy is offline
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Turrets Syndrome?
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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.
Old May 08, 2004, 11:56 AM
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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, 06:33 PM
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John..
With the winds we get this side of the Divide, are you sure maybe you aren't benifitting from a supercharged airdry....LOL
Old May 08, 2004, 10:25 PM
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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, 07:53 AM
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Sounds like a fun experiment.

Andy
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Old May 20, 2004, 01:21 PM
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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!
Old May 20, 2004, 10:17 PM
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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
Old May 20, 2004, 11:19 PM
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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.
Last edited by rpage53; May 20, 2004 at 11:22 PM.
Old May 21, 2004, 01:27 AM
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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
Old May 21, 2004, 09:06 AM
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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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