I painted a merc outboard a while back and it came out fantastic,my question is this time I just plan on roughing the paint up and spraying it with phantom black paint. I pretty much know what I'm doing,only question I have is if I get down to any bare aluminum on the outboard and I use zc primer over it will over spraying the aluminum were a little gets on the roughed up paint hurt anything, in order word's will it adhere to the existing paint without issue because it's going to get on some of the paint.