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Old 17-06-2024, 08:21   #1
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Rust stain removal on sails.

I have been trying to remove some rust stains on a Dacron sail. I have used vinegar, both edible (5%) and cleaning (8%) varieties, then Fullers stainless steel polishing powder with water, the stains have reduced but not gone away.
Anybody know a chemical which will remove the rust effectively without damaging the sail?
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Old 17-06-2024, 14:19   #2
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Re: Rust stain removal on sails.

A mild solution of oxalic acid should do the job. Usually available in hardware stores under various "wood bleach" or "concrete cleaner" labels.

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Old 17-06-2024, 15:01   #3
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Re: Rust stain removal on sails.

I would be inclined to try oxalic acid, as Jim suggests, if I were resolved to remove the stain. But, I would also be somewhat disinclined to try to remove the stain in the first place. I don't believe that leaving the stain will do any damage that is not already done (if any). So, it is purely aesthetic.

As such, I would be very conservative about how aggressively I went at the stain.
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Old 17-06-2024, 16:49   #4
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Re: Rust stain removal on sails.

Get a 5 gallon bucket of water and add about a cupful of bleach to it and some washing detergent. Insert that part of the sail where the stain is and let soak for several hours. May have to jamb something in the bucket to keep the sail inundated.

I have done this in the past without any ill effect to the sail and it removed the stain.
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Old 18-06-2024, 00:18   #5
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Re: Rust stain removal on sails.

Quote:
Originally Posted by Jim Cate View Post
A mild solution of oxalic acid should do the job. Usually available in hardware stores under various "wood bleach" or "concrete cleaner" labels.

Jim
Hi Jim,

If you are looking for it in Australia Bunnings have it as "Diggers Rust and Stain Cleaner".
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Old 18-06-2024, 07:15   #6
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Re: Rust stain removal on sails.

Thankyou, I will try your suggestions and report back in due course (no pun intended!)
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Old 18-06-2024, 07:31   #7
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Old 18-06-2024, 07:43   #8
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Re: Rust stain removal on sails.

Before I used Oxalic Acid, I would start with milder acids
Vitamin C - Ascorbic Acid
then
Citric Acid

Both are milder than Oxalic and have Iron Chelating Properties. When it comes to fabrics, I start with the mildest and work my way up to ignoring the stain.
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