I bought an old 1972 boat that has all cream colored vinyl. Ive tried vinyl cleaners in the automotive section as well as windex and other basic products. Nothing really takes the grime off. What is the best methods you guys have found? Also I need to remove green build up on the bottom of the fiberglass hull, I've tried power-washing and scrubbing with soaps and mild chemicals. What products do you recommend for that. Thanks, Mike.