I think you're not supposed to use self etching primer on plastics, so that might be something worth checking. If there's no plastic parts on the piece being painted he should be okay, but if there's any trim, push pin connects, etc Shadowarzez will need to make sure they're removed (or carefully masked)Only other thing is you might want a self etching primer for the first layer. When you do and don't need it is a bit beyond my experience.
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