[quote=DamonLinkous]You can remove oxidation from gellcoat using an Oxalic acid solution. It's cheap and effective, get Oxalic in powder form as 10% strength either as Bar Keepers Friend at your supermarket
[img]http://www.barkeepersfriend.com/files/homepage-products.png[/img][img]http://www.painterstoolbox.com/itm_img/smoxalic.jpg[/img]
it's also available sold as "wood bleach" in tubs at your hardware store.
Need a bucket, scrub brush, and dish-washing gloves. Mix up a strong solution of the powder and water and lightly scrub it into the deck with the brush. Do a three foot section at a time and leave the wet brushed surface to soak for 20 minutes (don't let it dry) then rinse it off with a strong blast from a hose.
If your deck non-skid is really bad you may need to repeat or scrub harder.
Important! Now your deck is clean as a whistle, just beautiful, but it is also porous and ready to get stained again. You'll need to seal it with a fiberglass sealant or wax.[/quote]
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