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Old 01-13-2011, 11:05 AM
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Default ? about cleaning water line stains from my boat hull

Hey guys. My hull is white fiberglass and has developed some stains around the waterline over the years. What is the best agent\method to use for removing a waterline stain from the boat hull. TIA.
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Old 01-13-2011, 11:15 AM
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Some use a diluted muratic acid solution. This is the easiest way to remove stains, but it will require you to take the boat off the trailer. Don't use while boat is on the trailer or it will eat the metal up. I usually use a product called barkeepers friend. It comes in a gold can similar to ajax or comet. You can find it at home depot, lowes or wal-mart. Use a non scratch scotch brite pad and make barkeepers into a paste rub onto hull and let sit for a couple minutes, then wipe off with a wet rag. It requires a lot more elbow grease than the acid solution but it works. Also works great on rust stains and just about anything else. Good luck
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Old 01-13-2011, 11:19 AM
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...then raise the water line an inch.
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Old 01-13-2011, 11:22 AM
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You can use the acid when on a trailer just make sure you hose it down and cover it with cardboard or wood in the area your doing. And apply with a sponge.. do it in about 5 ft. intervals so you dont get the acid all over the driveway and trailer. Keep hosing the hull and ground down and just work your way around the boat. Then put some wax on the area you did.
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Old 01-13-2011, 11:24 AM
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about $1 at most stores.

Like stated above, DO NOT git it on your trailer.
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Old 01-13-2011, 11:30 AM
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Starbrite Hull Cleaner.
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Old 01-13-2011, 11:46 AM
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on/off or muratic acid works great. just dont leave it on very long. then wax
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Old 01-13-2011, 12:30 PM
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I used The Works and it worked great. Super cheap too. Put on some gloves, get some on a sponge and wipe it on. The stains will disappear before your eyes. I kept a hose nearby and made sure to rinse the hull and trailer really well. Followed up with some Collinite wax and it looks new.
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Old 01-13-2011, 04:52 PM
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Rust-Aid, you can buy at Home Depot. Spray on, rinse off. Done.
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Old 01-13-2011, 05:38 PM
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on/off or muratic acid works great. just dont leave it on very long. then wax
I agree completely.
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Old 01-13-2011, 05:59 PM
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On Off.......... West Marine Works great on the water line
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Old 01-13-2011, 06:14 PM
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On Off.......... West Marine Works great on the water line
On Off is the deal. Nothin else comes close. I have used it for 10 years for water line and hard to clean stains. No need to jack with anything else. Buy it and your problem is solved!! It even took acid stains from a leaking battery off the deck in a friends boat!!! That was a mess nothing else would come close to taking off!!!
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Old 01-13-2011, 06:16 PM
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Originally Posted by A Few Dollars View Post


about $1 at most stores.

Like stated above, DO NOT git it on your trailer.
X5...........Rustaid works really well on the "easy" stuff too.....
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Old 01-13-2011, 06:30 PM
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Rust-Aid, you can buy at Home Depot. Spray on, rinse off. Done.
This is what you want to use. Toilet bowl cleaner works ok but is a gel and more difficult to apply evenly.

Spray on and let it sit for 30 seconds and then hose off.
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Old 01-13-2011, 06:43 PM
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You do not have to take the boat of the trailer to use muratic acid. Its not the end of the world if it drips on the trailer, just rinse it right away. Use a rag and wipe it on, the water line will vanish in seconds.
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Old 01-13-2011, 06:43 PM
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I use the starbrite hull cleaner, cut a 2"x 3" piece of outdoor carpet to use as an applicator.
Wear rubber gloves and wipe on, wait a couple of minutes for it to work and rinse.
No need to cover the trailer if you are careful.
I am still using the same bottle for the third year on a 23' boat
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Old 01-13-2011, 06:44 PM
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Quote:
Originally Posted by krugger3 View Post
Rust-Aid, you can buy at Home Depot. Spray on, rinse off. Done.
My cousin suggested this and supplied it when I first came home with my boat, since then it's what I use as it worked great for removing the dark water stains on the hull...
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Old 01-13-2011, 06:52 PM
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Originally Posted by A Few Dollars View Post


about $1 at most stores.

Like stated above, DO NOT git it on your trailer.
x8

Or SnoBowl. Same stuff just cost more.
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Old 01-14-2011, 12:28 PM
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Bar Keeper's Friend...and some wax afterwords..works wonders
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Old 01-14-2011, 03:33 PM
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On/Off works great!
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