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harpguitar 07-06-2008 09:55 AM

Removing rust stains on sails

I need some recommendations regarding specific products (and how to use them) to get rust stains out of sails.

Many thanks!


AlanBrown 07-06-2008 10:20 AM

I've used "Soft Scrub" to clean rust stains off my hull with much success. With its bleach component, I can't see why it wouldn't also work on sails.

One of the nice thing about this product is its price and the fact that you can pick it up at any grocery store.

donradclife 07-06-2008 10:22 AM

Try some oxcalic acid--pick it up at the hardware store for a fraction of what the chandlery will want.

harpguitar 07-06-2008 10:49 AM

Thank you Don, Oxcalic acid is what I have do you use it?


thekeip 07-06-2008 10:49 AM

I've used the 'FSR' (fiberglass stain remover) by Davis....the blue gel. It's an Oxalic acid product, works well.
Howard Keiper
Sea Quest

harpguitar 07-06-2008 10:53 AM

Thank you Howard, same question, exactly how did you use it?


whclay 06-02-2010 08:45 AM

I am having the same issue, have some rust stains and mildew stains on my sails. Got the boat from my father in law, he didnt take very good care of her so I am restoring. I have read that Oxalic acid is very strong and can damage dacron sails. That being said, I would love to hear a resonse to this. Can you cut the Oxalic acid with something to make it a bit more gentle? I have also heard OXIclean works fairly well. I soaked mine in a bathtub filled with laundry detergent. it helped, but I still have some stains.

calden 06-02-2010 08:50 AM


I've used this on rust stains on sails and it works when nothing else would. Takes a few applications. I can get it where I live at the local giant supermarket chain. Call around - it's commonly available at hardware stores, too.


thekeip 06-02-2010 09:20 AM

What I do is, I shake the jar (with the blue gel) and dab the residue clinging to the lid onto the stain with a glue brush. Trim the bristles to make them stiffer. Avoid getting the gel under any grommets you might have on the sail. DON"T use the FSR liquid in a spray bottle.
Howard Keiper

calden 06-02-2010 01:19 PM


So, harpguitar, do you play one? I have friend who makes them.

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