I wonder what the functional diff is between Plastic Polish/Paint Polish?!? Like, which is generally more/less abrasive. (yeah, I know...I oughta know that, huh?)
Is your ATV painted or is it colored/color-impregnate plastic? Or is it Gelcoat fiberglass?
I guess the duh-answer is to do a test spot, but I bet *somebody* here knows the real answer