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Let TotalBoat White Knight Fiberglass Stain Remover sit on tough stains for 10-15 minutes and its non-abrasive formula does the work for you to remove exhaust, rust, scum, waterline and other ornery stains with no hard rubbing or scrubbing needed, and without damaging gelcoat. Great on hulls and transoms. Available in a 16 oz. container.
Use rubber gloves when applying. Wet the area before application. Always test in a small, inconspicuous spot before attempting to use on a large area. Using a brush or rag, apply a thin layer of TotalBoat White Knight to the surface and allow 10-15 minutes for it to work, then scrub with a soft brush or sponge. Rinse the surface thoroughly with water to remove White Knight before it dries. Some tough stains may need a second application. For cleanup, use water.
June 16, 2021
I bought this to see if I could remove the river water stains from our boat. I had tried everything from degreaser to scrubbing. This product is amazing! Some areas I had to apply 2 applications, but it all came off. I highly recommend this.
April 20, 2021
It worked well I would t go quite the full 15 minutes got to dry I have recommended it to 2 friends already
April 19, 2021
I watched Louis' video, which was quite compelling. One of my sailboats has chronic fouling at the overhang, which is a tough location to maintain. That would be the test. Well to say it passed would be an understatement. The picture of before and after says it all. Thanks JD!
February 12, 2021
Use this product for the first time it looks like something else I use to use, tired it on a yellow stain and you can see work.
December 9, 2020
Just like the videos, I just painted it on and the discoloration/ dried scum on my hull just disappeared after a couple of minutes. I found a few spots that I missed and hit again with a second pass and it came out perfectly clean with no effort.
June 26, 2020
said it would work on bathroom showers....it didn't work on ours.
May 31, 2020
I used this on our 1995 Mako. Lots of Iron staining here in Maine. Used by instructions and our haul came out amazing. Highly recommended. Great value.
May 30, 2020
My boat lives on a mooring in season and by fall the hull always has yellow staining above painted bottom. You simply apply this product and the staining disappears before your eyes. No elbow grease required, simply apply on stained fiberglass, wash it off and you're done.
January 12, 2020
This is the "Best" boat hull cleaning I have ever used, Thank You Louis Sauzedde for the info !!!
September 10, 2019
Removed brown stain from white hulls on three small boats. Stains were gone in about one minute. Still have half the 16oz left!