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Old 06-09-2013 | 08:20 PM
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Kmot
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Joined: Jun 2003
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From: Northridge, CA
Default RE: repainting an engine

Here I am.

To change the color it would be best to remove the old paint first. There are a number of ways to do this. All of them will require stripping the engine down completely to its bare components.

I have used Dawn Power Dissolver to clean parts but I do not know if it will strip paint. I know brake fluid will strip paint. Or any number of regular "paint stripper" chemicals at the home depot type stores.

Once you have the old paint stripped, make sure you have the parts clean and grease free. Wash in solvent or denatured alcohol.

You need to mask the areas you do not want the paint to get into. This takes time and precision with an Xacto knife. Use toothpicks, q-tips, sacrificial screws, etc to plug screw holes.



I like to paint the hole engine case at one time. Because painting one side first, and then the other makes for uneven finishes. So sometimes I will use wire and hold the engine up by the wire while I spray all around it.

Once the paint is satisfactory, and dry, I bake it in an oven for one hour at 250°F after removing any masking tapes. Then I shut the oven off, leaving the painted parts inside and just let it all cool down for a few hours to room temp. Baking the paint helps cure it and make it harder.





I use Duplicolor automotive engine enamel with ceramic.