Hi Bob, you can use anything on your all molded towable that you would use to clean a
fiberglass shower in your sticks 'n bricks home. A lot of that stuff will remove wax (and grunge). What you need to do now that you've gotten it clean, is use a good wax... like Meguires Flagship:
http://www.meguiars.com/en/marine/pr...rine-wax-32oz/
I'd suggest a twice a year wax job. Before the first camping trip and after the last camping trip of the year.