Try this before spending a lot of money. My H-17 had set outside for about 3 years or more of none use and had that green mold all over it. I got a $1 can of Bon Ami at local grocery store and a stiff bristle toilet brush. Made the boat look like it was brand new. Paste of it even got out rust stains!!

Try it, all you will loose it $1 plus tax.

Doug