I have a 8 person Clearwater hot tub the previouis owner thought he had a leak in the back of the seat inside the tub. It turned out to be a scratch mark but they didn't remove the tar does anyone know if I can paint the tar patch too have it match the colour of the tub. What would you suggest I can use I did try taking it off but it also pulls of the fiberglass coating not good. I would appriciate any help you could offer to resolve this issue.