yeah, I have a little experience with rolling automotive paint. I am a commissioned artist and I've done a few auto murals with brushes. Sometimes if the mixture isn't right strokes are noticeable. I reading a lot that says 50/50 mixture... Gilcano above suggests 1/3 thinner to paint. Anyone have any suggestions on paint/thinner/hardener mixture? In response to Gilcano above, Ill be riding on the beach and mud a lot, as this is my second and much more recreational vehicle, so Im pretty sold on the roller method.... also since Im not changing the color, just going from red to the closest version of red. Keep the advice and pics coming - this is super helpful!!