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Painting Over Powder Coating

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Q. Can I safely paint over powder coating on my engine? I have a Harley with aluminum powder coated cases that I would like to paint black using high heat engine paint, is it possible? How do I prep it? M. D.

 

A. Why would you want to replace a durable powder coating with an aerosol liquid paint from a can? It won’t wear as well and may chip easier. If you really, really, really want to do this, then the only sure bet is to completely remove the powder coating first. Grit blasting the engine parts using plastic media will do the least harm to the aluminum and yet remove the powder coating completely. If you don’t remove the powder first, you could have some inter-coat adhesion problems with the liquid paint and powder
coating.
 

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