So my boat was left in the water for 4 days in lake chatuaqua. When I pulled it out it had a terrible orange/yellow waterline, and the transom and bottom was really bad. So I started googling, toilet bowl cleaner didn't work.... Awesome cleaner didn't work, then I tried Bio-Kleen and the stuff is a miracle! I sprayed it on... Waited 1 minute and hosed off! All clean. Nothing else I tried worked. Also bio Kleen is bio degradable and won't harm the trailer. I DO NOT WORK OR KNOW ANYBODY WHO WORKS FOR THIS COMPANY. Just thought I would share what worked for me when nothing else I tried had any effect. It completely took it all off, back to shines white. Good stuff, and cheap

Diluted muratic acid will do it quick, 50/50 with water, spray on, let set for a minute or two and hose off thoroughly ������

The best u have found is Iron Out in a Hayden sprayer

Oops I meant to type garden sprayer

3pointstar

Wish I had known you were here. I live on Chautauqua Lake.

We always use a product called Slimy Grimey.

Pad

Which one did you use and where did you get it?

The only toilet bowl cleaners that take out the stain are Sno Bowl and The Work's. They are acid based.

BioKleen hull cleaner works well, but not as quickly.

The Works works..

Slimy Grimey works very well, and then apply collonite 885 paste wax which really keeps the staining from coming back as quick.

Goof Off Rust Stain remover, $10/gallon at Home Depot. Spray on, rinse off, wax area, done. I really like the BioKleen Amazing Cleaner and Amazing Armor for vinyl, and the Quik Shine between waxing, but the Goof Off works fast, cheap, and right on the rust/scum lines.