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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 15 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 20 Reviews

June 10, 2024

Easy to use
By Flash dance from Newport RI

Verified Purchase

it does just it should. The easiest part of spring boat prep. Have a Magic Eraser handy for non-yellowing related 'gunk'.

Bottom Line Yes, I would recommend to a friend

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April 24, 2024

yes
By Big Foot from Florida

Verified Purchase

works great!

Bottom Line Yes, I would recommend to a friend

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May 7, 2023

No better than regular deck cleaner
By Cjturbo from Baltimore

Verified Purchase

I used to according to directions, two applications. See no difference in the staining. Got the same result with standard deck cleaner.

Bottom Line No, I would not recommend to a friend

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August 8, 2022

works almost instantly
By Rowing Eric from Noank, CT

Verified Purchase

We use this on our white -hulled rowing shells, which get brown stained. The brown stain dissappears in less than a minute!

Bottom Line Yes, I would recommend to a friend

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November 3, 2021

I will buy this product again...
By Granny from Magalia, California

Verified Purchase

Not sure this is important, or just that I am old! 🤭! When I opened my purchase, I did not realize that it was like a liquid, it spilled on my new sweater and ruined it. I guess I thought it was a paste like product, that was not going to spill on me!! Do not know if you need to know this, but thought I would let you know. I purchased this to clean my fiberglass shower, and it worked great! Thank you, Susan Short

Bottom Line Yes, I would recommend to a friend

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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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