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Product Details

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.

Info & Guides
Directions

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.

Reviews for TotalBoat White Knight Fiberglass Stain Remover

10 of 15 Reviews

September 10, 2021

Like a teeth-whitener for your boat!
By Sisters'ships from Great South Bay, NY

Works incredibly well. Have used other brands before. This is at least as good as any I've tried.

Bottom Line Yes, I would recommend to a friend

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June 16, 2021

Amazing Product
By Susan from Canada

Verified Purchase

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.

Bottom Line Yes, I would recommend to a friend

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April 20, 2021

Great stuff
By Montana from Mountain west

Verified Purchase

It worked well I would t go quite the full 15 minutes got to dry I have recommended it to 2 friends already

Bottom Line Yes, I would recommend to a friend

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April 19, 2021

Very impressive!
By RLW from Tiverton, RI

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!

Bottom Line Yes, I would recommend to a friend

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February 12, 2021

Good Buy
By ALT from New Orleans, LA

Verified Purchase

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.

Bottom Line Yes, I would recommend to a friend

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December 9, 2020

Great at cleaning scummy hulls
By Nick from Seattle, WA

Verified Purchase

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.

Bottom Line Yes, I would recommend to a friend

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June 26, 2020

didn't work as planned
By Rich from illinois

Verified Purchase

said it would work on bathroom showers....it didn't work on ours.

Bottom Line No, I would not recommend to a friend

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May 31, 2020

White Knight is amazing
By kaiabrew from Falmouth, ME

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.

Bottom Line Yes, I would recommend to a friend

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May 30, 2020

Excellent Product
By Kind of Blue from Jamestown. R.I.

Verified Purchase

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.

Bottom Line Yes, I would recommend to a friend

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January 12, 2020

Best Ever , hull cleaner
By solar bill from galloway nj

Verified Purchase

This is the "Best" boat hull cleaning I have ever used, Thank You Louis Sauzedde for the info !!!

Bottom Line Yes, I would recommend to a friend

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