View Full Version : Water stain

08-10-2012, 07:32 PM
Any suggestions on removing water stain from my Pro205? The color is light gray and I have been unable to get the water line off.

08-10-2012, 08:54 PM
I use Starbright, or Spray Nine boat bottom cleaner. It's acid based, but it doesn't seem to harm the gelcoat at all. Put it on a damp mop, lightly mop, and rinse off. Works awesome. Use rubber gloves to protect your hands, and wax the boat after.

08-11-2012, 12:12 AM
And rinse your trailer thoroughly after.

08-11-2012, 09:25 AM
ON & OFF Hull & Bottom Cleaner for fiberglass, by MARYKATE, removes tough waterline stains, algae & Barnacle stains, rust and exhaust stains. Works awesome!! need gloves, eye protection and work up wind. spray on, light scrub, rinse everything well. Boat will look like new. Absolutely wax after.

08-11-2012, 11:15 AM
Great! Thanks very much. My Mastercraft logo is also faded. Will this cleaner help?


08-11-2012, 02:54 PM
The On & Off Hull cleaner will nor bring the color back on a decals, If they really look bad I suggest replacing them. I think I have seen other posts on that topic. Also Waterskis.com / Midwest MasterCraft may have some.


08-13-2012, 01:04 PM
I bought on-off for my boat because i kept it in for a week on a muddy river (fuel pump died - couldnt get it out).

one of the guys from our boat club advised me not to use it - way to strong for my application (i have a black hull, which shows EVERYTHING). I would try some pure vinegar, a scrub brush and some elbow grease. worked for me.