Hi guys- first post here so I apologize if my answer can be found elsewhere- I am repainting some motorcycle fenders for a guy who wants them undercoated but still wants to show the bike. On my show cars I do not undercoat. Is there a product I can use that is NOT like the old tar undercoat- (bumpy and gooey) that I can paint over to give a ‘cushion’ undercoat but still be very presentable at a show? Thanks for any help- DJ