I agree with Alan, although spilling kero on it will not eat it or bubble it, as he says, you can rub the paint off. Nothing wrong with leaving it, it's just not an auto quality paint. Ok for doing small touch ups but, not much good for larger areas and certainly wouldn't re-do the fin colours with it.

if I remember correctly, CARF has a note on their site stating something to the effect of " it may not adhere that well as an exterior paint as it's meant to be used in the mold." My experience is, they are correct, it comes off easy. Dave, i'm really surprised your painter likes it!

Mike