Tannin stain remover

[Oldlaxer1]

I just bought a sailboat to compliment our '53. It had a fair amount of tannin staining. I'm not planning on hauling the boat until the end of the season but I wanted to try to clean her up a bit before then. I realize Mary Kate ON_OFF works well for this application but I didn't want to use it while in the water. It is a fairly strong acid and it is not recommended for use while in the water. I found a product called Booyah Clean https://www.booyahclean.com/collections/booyah-clean-front-page-products and figured why not give it a try. I used the boat soap sprayed at low pressure thru my pressure washer and then followed up with high pressure. It cleaned the hull but didn't do much on the tannin stains. They recommended using it before the stain remover. I then applied the stain remover with a little pump up garden sprayer from bow to stern. I went back with the pressure washer to rinse and the stains were gone. I'm really impressed. It isn't cheap but it is EPA certified safe for direct release. I have no affiliation with the company, just thought I'd pass along something that worked well for me. I'm in the Chesapeake by the way.

 

[carolinacoast]

that is the go to product down here for boats without bottom paint and a week or less in the water. replacemnet product for on/off without the acid.
center console fishing guys swear by it. works well.

 

[racclarkson@gmail.com]

Tried toilet bowl cleaner?

 

[Pascal]

Best one is Davis FSR available are every shipChandler. It s a blue gel you wipe on, let sit a couple of minutes and rinse. Works great for pulpit stains too.

 

[Briankinley2004]

I find SnoBowl or similar toilet cleaner to work better than FSR and is way cheaper. One caveat on "The Works". It works but the local Dollar Tree sells a version that is a different acid than the Dollar General or Wal Mart "The Works". That one don't work

 

[VieEnRose]

+1 for booyah, especially if the boat is in or near the water.

 

[kingsley_oasis]

I have used Barkeepers Friend powder, which I believe contains Oxalic acid.