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Hull with some browning

Old 04-24-2019, 03:01 PM
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Originally Posted by TTaxi View Post
I'd 1st try a Mr. Clean Magic Eraser wetted out with 303 Protectant .
I avoid using Magic Eraser anywhere on my boat. Its almost always the wrong thing to use due to its abrasiveness.
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Old 04-24-2019, 03:29 PM
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Once you acid clean it off, a sealant like Rejex will do much better than wax on getting it to not show up again. I know this first hand.
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Old 04-24-2019, 03:29 PM
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https://www.booyahclean.com/collecti...t-hull-cleaner , works well.
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Old 04-24-2019, 03:34 PM
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I use mary kate on-off. As long as you pay attention it works wonders and can be done rather safely.

Take an old tarp and drape it over your trailer. Then pour a small amount of the mary kate into a bucket. Have the garden hose ready. Get an old paintbrush or a cheap disposable one and apply to stain, use brush to scrub it lightly. Will take it off in about 30s. Then take the hose and rinse like hell. When you think you rinsed it good, rinse it one more time. Remove tarp and rinse trailer for good measure.

Wear gloves, preferable long sleeves and hold bucket away from you, do not sniff the fumes over the bucket. Also DO NOT touch your eyes or anywhere on your face until you have thoroughly washed and rinsed your hands.
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Old 04-24-2019, 03:56 PM
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The Works toilet bowl cleaner. Go to a dollar store to get it.
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Old 04-24-2019, 07:15 PM
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On off ,use a paint brush and dilute the on off and it goes a long way. Dont breath it or contact it .You don't need alot on the brush it spreads easy. Wet surface first .then brush on. Just about anything your gonna use isn't good for the bottom paint or trailer, grass etc. Tape off your bottom line if you want to. Would be a good time to consider bottom painting .. I always wax after using any on off . Yes you can use toilet bowl cleaner if you want to . But after using on off I never would go back. It expensive but used properly I can do a few boats with one . On off works hundreds of times better and faster then the toilet bowl stuff. But if you have time and want to go super cheap then there you go.
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Old 04-24-2019, 07:30 PM
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Thanks for all of the replies!!
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Old 04-25-2019, 02:44 AM
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David Bell,
As you can see, there are several opinions on the right way to do this. IMHO, none of them are quick and easy.
I just finished removing the waterline stains on both a 27 World Cat and a 21 Sea Hunt center console. I used Colonite fiberglass cleaner (and a lot of patience) followed by Colonite insulator wax. The wax helps reduce new staining but there is no doubt I'll be doing it all over again next season.
All the best,
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Old 04-25-2019, 03:35 AM
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My favorite Oxalic product is Y-10 gel (Y-10 = whiten!) paint it on, walk away for a beer / coffee, come back and the job is done - all you have to do is hose off the residue - couldn't be easier (in contrast to what people are saying about some of the products here, it IS easy) - it will take about 5-10 minutes of minimal effort and 10 minutes of waiting to clean the hull in the OP and it's not as nasty as some of the products in this thread sound. Note it does take your sealer off, so if you have polished and sealed your hull, apply a new coat of sealer afterwards (Nu Finish is the one I've found best for longevity) - note resealing won't stop the browning but it does help to keep the hull's shine.
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Old 04-25-2019, 03:55 AM
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Originally Posted by Clinker View Post
My favorite Oxalic product is Y-10 gel (Y-10 = whiten!) paint it on, walk away for a beer / coffee, come back and the job is done - all you have to do is hose off the residue - couldn't be easier (in contrast to what people are saying about some of the products here, it IS easy) - it will take about 5-10 minutes of minimal effort and 10 minutes of waiting to clean the hull in the OP and it's not as nasty as some of the products in this thread sound. Note it does take your sealer off, so if you have polished and sealed your hull, apply a new coat of sealer afterwards (Nu Finish is the one I've found best for longevity) - note resealing won't stop the browning but it does help to keep the hull's shine.
Never heard of Y-10. Where can you purchase it?
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Old 04-25-2019, 04:05 AM
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Muriatic acid is another. You can get a lifetime supply for $5 at lowes. Mix it 50/50 in a spray bottle. Same warnings as above, don't breathe it, drink it, get it in your eyes, or on skin or trailer.
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Old 04-25-2019, 04:18 AM
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Is it a newer boat? What is the condition of the gel coat? If the hull is oxidized, I would say it’ll need to be “cut” out. Shiny gelcoat usually washes right off.
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Old 04-25-2019, 04:42 AM
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barkeepers freind. CHEAP, EASY, SAFE, available almost any market/walmart/etc... and it works suprisingly well
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Old 04-25-2019, 05:26 AM
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Just don't let the On Off get on your trailer. Wet the trailer down and try to cover it with something. ON Off and muriatic acid work the best.
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Old 04-25-2019, 05:59 AM
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Originally Posted by jfigliuolo View Post
barkeepers freind. CHEAP, EASY, SAFE, available almost any market/walmart/etc... and it works suprisingly well
another thing i'd avoid using on a boat

its abrasive like a magic eraser

further BKF is meant to be used on non-porous surfaces and fiberglass is porous

Last edited by mystery; 04-25-2019 at 06:40 AM.
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Old 04-25-2019, 06:38 AM
  #36  
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Some of these suggestions are baffling to me.
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Old 04-25-2019, 07:00 AM
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Here is another vote for FSR. I have used many methods and FSR is by far the easiest to use. Put the gel on and let it sit, then rinse. If it needs another application by all means do it... it works like ON/OFF but is slower. This is about the only situation where a less powerful product is preferred because ON/OFF will blow your frikkin eyebrows off. FSR for me is a highly controlled version of ON/OFF. I tend to go around the whole boat with it and by the time I get back to where I started it has done it's job 80 percent. I hit the areas on the second pass that I missed on the first then rinse it all off well and the job is done. FSR also doesn't seem to let the hull get brown again nearly as fast as ON/OFF. When I used that stuff the hull would get brown again super fast.
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Old 04-25-2019, 08:13 AM
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FSR, On/Off, Rust-Aid, acid, etc. will all work without any scrubbing required. The first drawback is that you need to wax or put on a polish with sealer like the Starbrite Polish with PTFE after the treatment, the 2nd drawback is that the spots you treated might stand out because they look better than everywhere else and you end up doing the entire boat.
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Old 04-25-2019, 08:17 AM
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Hull cleaner then compound/wax
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Old 04-25-2019, 08:17 AM
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Originally Posted by tarpononecharter View Post
Never heard of Y-10. Where can you purchase it?
https://www.jamestowndistributors.co...ct.do?pid=2486

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