My boat had some stains in the gelcoat from the tannins in the CT river, I did a little reading and came across a product that was inexpensive, non-toxic and seemed to work well. All I used were gloves because it's an acid and some garage/shop heavy duty paper towels. Did a once over on the stains and waited about 15min, then was able to use the paper towel and remove the stains.

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I have been using FSR or Fiberglass Stain Remover for years, (and just today as I hauled out) Put some in a spray bottle cut heavily with water. Shake to break it up (it is a gel) so the pick up doesn't clog so easily. Spray on. Five minutes hose off. I keep a spray bottle on the boat all season long. It will take off your polymer, ceramic or wax coating... Also good idea to hose off trailer too.


http://www.striped-bass.com/Stripertalk/showthread.php?t=86847&highlight=fiberglass+stain+remover

Was all prepped for an intensive inside cleaning... Sprayed on MoldArmor (Mold and Mildew Killer and Quick Stain Remover) I picked up at Ace. Wow... Hosed off after I got portside sprayed and it is cleaner than I can ever remember... Now I definitely can not speak for it being non toxic, not with those results... Was done in less than an hour, complete interior. Even the underside of rear deck hatches that open to the bilge. I had never gotten them even close to being clean!

Just spent yesterday and this morning washing, polishing and waxing inside and out… then ran out to pick up dinner,,, hose down done!
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