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Old 03-12-2007, 06:12 PM
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Default Removing Lake Scum From a Boat

Any ideas?
I am referring to the black or yellow stuff that you can wipe off, but there is still a hint of it left on the boat no matter how hard you rub.
thanks!
Jason
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Old 03-12-2007, 06:42 PM
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Default Re: Removing Lake Scum From a Boat

ON-OFF hull cleaner at most boat stores worked for me
in combo with a mr clean magic eraser

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Old 03-12-2007, 07:09 PM
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Default Re: Removing Lake Scum From a Boat

FSR - Fiberglass Stain Remover

Its a blue gel. Wipes on and wipes off. Works great on our local Lake's scum
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Old 03-12-2007, 07:32 PM
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Default Re: Removing Lake Scum From a Boat

FSR - Is it that easy to use? No elbow grease?
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Old 03-12-2007, 07:51 PM
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Default Re: Removing Lake Scum From a Boat

Use the ON/Off.

Be careful, it's acid and the fumes can get to you. But if you want it done fast and easy thats the way to go.
Follw directions on the bottle.

Or you could just use Muratic acid, far cheaper and works just as well.

I have removed the stains and scum of entire 30' boat bottoms in less then 20 mins.
Brush on, let sit then rince and rince again.

Wear gloves with any of the above inculding FSR as they will eat into any small cut in the skin.

Be Big,
Alan
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Old 03-12-2007, 08:05 PM
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Default Re: Removing Lake Scum From a Boat

Ask them politely but firmly to get off your boat. Tougher if they are family or in-laws - geesh don't get me started...
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Old 03-12-2007, 08:05 PM
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Default Re: Removing Lake Scum From a Boat

sno-bol toilet bowl cleaner is cheap and it works great.
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Old 03-12-2007, 08:17 PM
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Default Re: Removing Lake Scum From a Boat

Quote:
sinjun - 3/12/2007 9:05 PM

sno-bol toilet bowl cleaner is cheap and it works great.
totally correct - like 2 bucks - stay out of the marine stores when the grocery store works just as well.....
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Old 03-12-2007, 08:19 PM
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Default Re: Removing Lake Scum From a Boat

or "The Works" toilet bowl cleaner from walmart... I dilute it at least 50 % with water in a spray bottle.
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Old 03-12-2007, 08:28 PM
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Default RE: Removing Lake Scum From a Boat

Quote:
JasonG - 3/12/2007 5:12 PM

Any ideas?
I am referring to the black or yellow stuff that you can wipe off, but there is still a hint of it left on the boat no matter how hard you rub.
thanks!
Jason
Starbrite "Hull Cleaner" worked well for me. I noticed that the main ingredient is oxalic acid. It turns out that Dekswood Deck Cleaner (from the home center) is the same stuff and much less expensive. That's what I use now. Dillute it as directed and follow the safety precautions. It's labelled as safe for fiberglass.
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Old 03-12-2007, 08:42 PM
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Default Re: Removing Lake Scum From a Boat

Quote:
dpowell - 3/12/2007 8:05 PM

Ask them politely but firmly to get off your boat. Tougher if they are family or in-laws - geesh don't get me started...
Great stuff !!

Be Big,
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Old 03-12-2007, 09:35 PM
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Default RE: Removing Lake Scum From a Boat

BAR KEEPERS FRIEND $1.67 AT WALMART. DO A SMALL AREA AT A TIME. RINSE OFF WITH FRESH WATER THEN WAX.

WHEN RINSING OFF USE A CLEAN WET CLOTH AND RUB OVER AREA JUST CLEANED. WORKED THE BEST FOR ME.

PIER
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Old 03-13-2007, 12:07 AM
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Default Re: Removing Lake Scum From a Boat

Believe it or not...Fantastik Spray Cleaner. Also gets fiberglass resin off your hands. No scrubbing necessary. Spray on wipe off. I trust you mean that blackish-gray waterline gunk all around the transom.
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Old 03-13-2007, 07:32 AM
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Default Re: Removing Lake Scum From a Boat

CLR anyone, works pretty quickly
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Old 03-13-2007, 12:57 PM
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Default Re: Removing Lake Scum From a Boat

Quote:
Rod@Serengeti - 3/12/2007 11:07 PM

Believe it or not...Fantastik Spray Cleaner. Also gets fiberglass resin off your hands. No scrubbing necessary. Spray on wipe off. I trust you mean that blackish-gray waterline gunk all around the transom.
It depends on the "scum". I tried just about everything. Once it dries for a day or so, nothing but acid will get rid of it. Not even rubbing compound.
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Old 03-13-2007, 08:01 PM
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Default Re: Removing Lake Scum From a Boat

anybody try muriatic acid??? spray it on with a plastic pump sprayer and just hose it off. Watch the fumes and the trailer as it will etch steel.

Ray
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Old 03-13-2007, 08:37 PM
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Default Re: Removing Lake Scum From a Boat

Kaboom cleaner worked for me. Just spray on and rinse off, no rubbing required. Nothing else even came close.
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Old 03-16-2007, 05:37 PM
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Default Re: Removing Lake Scum From a Boat

What about regular ajax or comet?
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Old 03-16-2007, 07:08 PM
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Default Re: Removing Lake Scum From a Boat

Quote:
JasonG - 3/16/2007 4:37 PM

What about regular ajax or comet?
Those are abrasive and will damage the gelcoat. It's a really bad idea.
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Old 03-19-2007, 12:55 PM
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Default Re: Removing Lake Scum From a Boat


I get the same 'yellowish' stain and ON and Off takes it right off with NO scrubbing at all. The stuff is strong, so I would never spray it. I wet a towel with it and wipe the boat. 4 Minutes later its white and I can tell because its real obvious where I miss a spot.

Ken
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