I have a white hull boat, and we boat in some muddy water, and its stained the bottom of the boat, a brownish color. Is there anything out there that I can remove the stains on the bottom on the boat.

Power 1 from Fountain of Youth works good. Also know guys who use toilet bowl cleaner or muriatic acid.

+1 on the toilet bowl cleaner,,the WOKX brand works the best,,buy a few bottles and dump them in a pump sprayer and go to town,,almost works instantly..

power 1 works great, its a little less harsh on the skin than toilet bowl cleaner. both will do the job for you.

I picked up a blue gel product called FRS (fiberglass restoration "something") from West Marine on the recommendation of the sales guy. I could not believe how incredible it was. Wipe it on and let it sit a few minutes, then rinse off. Within 30 secs, you can see the brown/yellow turning white. I thought it was just 26 years of old and could never be white. I was wrong. That stuff was amazing!

BTW - the picture of my boat out of the water was pre-FRS in July. It is white now!

I checked - got the name wrong. It is Davis FSR (Fiberglass Stain Remover)

I use stuff called Iron Out from home depot. Put some in a garden sprayer, add water and just spray it on. Stains just disappear then rinse with water.

I have and use Hula Hull Cleaner. It is non acidic biodegradable and can be diluted. Mixes up to 4:1 goes in a sprayer, sprayed on and wiped or rinsed off after 30-45 seconds of dwell time. Can also be used to remove water spots from fiberglass, windscreens and brightwork.

from West Marine ...NO AND OFF Spray on and rinse off ....it works awesome