08-04-2017, 06:13 AM
I don't know if this applies to the aluminum on our coaches, but way back in my aircraft days it was absolutely necessary to etch the skin prior to priming and painting. Failure to etch would result in poor paint adhesion. That was decades ago and technology has changed so maybe this too has changed. I would want to know a shop has experience with aluminum.
Jon Kabbe
1993 coach 337 with Civic towed