It is possible to plasti dip a jet ski. It may be tricky to do because jet ski usually contains kind of antimicrobial protection coatings. Many jet ski owners have tried plasti dip jet ski but failed. They also encountered two problems: First, it is hard to spray the jet ski uniformly, especially the bottom part of the jet ski. Secondly, the acetone used in plasti dip tends to make the surface of the jet ski dull and not that attractive. The best way is to remove the anti-microbial protection coatings from the jet ski to make it possible to spray the jet ski uniformly.