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Old 16-08-2009, 04:14   #1
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Cost-Effective Way of Removing Rust and Grease Stains?

Hi guys, has anyone got any tips for removing rust and grease stains from my gel coat that won't break the bank?
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Old 16-08-2009, 04:18   #2
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Oxalic acid will do this.

Oxalic Acid Crystals

If the stain is really bad, add wallpaper paste to the diluted crystals, then slop the resulting paste onto the stain, and it will remain in place until you are ready to wash off!
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Old 16-08-2009, 04:21   #3
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Davis FSR does a good job.

Just don't leave it on the gelcoat too long. My gelcoat is an ivory shade, not pure white. The FSR bleached it out where put some on and got distracted by something else.
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Old 16-08-2009, 06:02   #4
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The active ingredients of “FSR” are (gelled) Oxalic Acid & Isopropanol (rubbing alcohol).

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Davis FSR does a good job...
Quote:
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Oxalic acid (crystals) will do this...
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Old 16-08-2009, 07:24   #5
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I use a spray that I bought at Home Depot - "Rust Away" I think. Spray on, let sit, hose off - rust stains gone.
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Old 16-08-2009, 09:04   #6
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Old 16-08-2009, 10:17   #7
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Another excellent product, based upon Oxalic Acid, “Bar Keepers Friend”.

“Rust Away” is based upon mostly Phosphoric Acid, with a little Glycol Ether, Hydrochloric Acid, and Methanol.
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Old 16-08-2009, 11:16   #8
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There is also a liquid version of Bar Keeper's Friend that I use - it specifically states rust remover. I've not tried it on fiberglass but it works really well on my stainless.

Bar Keepers Friend Liquid Cleanser

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Old 16-08-2009, 18:16   #9
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Mmm, wallpaper paste. Yummy. Also known in the US as "wheat glue" it is mainly just wheat flour, which probably would be cheaper and faster to grab. (And that's also why roaches can survive on just wallpaper paste, they're eating dried wheat gruel.)
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Old 17-08-2009, 13:39   #10
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Also ZUDS, another Oxalic acid product cheap at hardware stores
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Old 17-08-2009, 13:46   #11
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I used Vanish toilet bowl cleaner -- at least I think that's what it was called; it started with a V, for sure. It worked great and since I bought it at the supermarket, it was CHEAP.

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