STAR BRITEInstant Hull Cleaner - Easily Remove Stains, Scum Lines & Grime for Boat Hulls, Fiberglass, Plastic & Painted Surfaces - Wipe On, Rinse Off Formula 32 Ounces (081732)

This products/brand was suggested to us by a friend and fellow boater. We had let the water line scum build up for far too long. Each year we said we would clean it and then get side tracked with other priorities. We had tried other products and felt discouraged. This worked IMMEDIATELY! Only using shop rags paper towels, the scum came off with ease and right away. Would recommend to any one and wouldBuy again. Photos you can see the yellow color on one side and then the other side where we had used the product.

This stuff is Amazing and Hardly any Effort to Apply.You really just wipe it on. Leave it on to do its work for you. Then rinse off. No scrubbing or rubbing. You won’t break a sweat. Yes, it’s pricey but works and is worth it vs hard manual labor as the alternative.Don’t apply while the boat is on your driveway…. Pull it onto the street or you may end up with spots on your driveway.

This is a very good hull cleaner ease to removel of a lot of stans. I like to rub it in by hand and wash with water hose removal performance is very nice value for your money

I have some pretty heavy buildup from years and years in a pond. Some came off great, some took more work and multiple applications, some didn't come off no matter how much work. If this were used once every year or two, it'd probably be perfect, will do that on future boats.It's a good product, but don't expect miracles, it can't get 20 yr of accumulation off.

I tried the same product in gel form. It worked well but this formulation worked like magic. I put some in my sink and years of gunk just melted away.I may need to order more of this! Highly recommended!

We wash our boat after every trip but a week or 2 a year in the water when on vacation and we had a yellowish/ orange discoloration around the boat. We have scrubbed many times with no success. I applied lightly per the instructions and waited a few minutes and POOF all the discoloration is GONE . No scrubbing at all, apply, sit and rinse. I could not believe my eyes! If you are skeptical....don't be..IT WORKS!!

This stuff is amazing. I cleans all lake residue off the hull in seconds with little elbow grease leaving a brand new looking hull. The instructions recommend wearing gloves. Definitely do this as the stuff is acidic. Smells like nitric acid to me. Also, make sure this doesn't sit neat on concrete. Will etch the concrete. Be prepared to do the entire hull, not just spots, because once you start, even parts that appeared clean will definitely show where you used product and not.

Did not notice a big difference.

利根川・猪苗代湖等で淡水使用のスキーボート数年間洗っていなかった黄色～茶色っぽいひどい水垢汚れ自宅にあったマジックリンでは全くだめパーツクリーナーでも全くだめ3Mのボート用クリーナーワックスを使ってみたが全然汚れが落ちない…ユーチューブでスターブライトのクリーナーを使用して汚れが落ちている動画を見てためしに購入してみたらバッチリ動画の通り汚れが落ちました。最初からこれを使っていれば良かったと思いました。おすすめです。