Oxalic Acid 5% Solution Container Bleaching/Stain Removal/Rust Remover (1L Container)

Very good the acid removed all the ungrounded stains off the white of my yacht,Definitely be ordering more at the end of the season

I wish I had done a before and after. This stuff is legit! I had a bit black ring from a pan on our wooden top. Poured a tiny amount in a bowl and used a cotton bud to wipe around the area. Let it sit. Came back 30 mins later and it was completely gone

This is oxalic acid, it's pretty straightforward. If you need instructions then you shouldn't be buying this product, let alone using it. That's a bit like needing instructions on how to use vinegar! And this works, you just need to know how to use it. I had the most horrendous rust stain on my boat's roof, where the previous owner had left a metal tray lying on it for two years. The stain was deep and measured a good half metre in length, with further rust smears running off it. I spent a few hours with a scrubbing brush and about a quarter of this bottle over a number of sessions. Unfortunately I don't have before and after pictures but take my word that it was a massive improvement after treating it with this. I recommend using washing up liquid, especially if you're rubbing on a vertical, as it holds the acid in place. Depending on the surface you can leave to soak for 10 minutes, but I find it's better to apply it a number of times after leaving for only 30 seconds each time. My only complaint is the expense. It's cheaper to buy crystals and make your own solution, but this stuff works as expected.

Used this on my 20 year old truck in restoring. It was heavily rusted and this really helped deal with a lot of the surface rust.

Well packed and quick delivery.

No miracles

This was recommended to take the rusty marks from the expansion pipe of my upstairs neighbour but as you will see from the photos this acid cleaner did not work.

Very effective at removing black marks caused by tins left on worktop. I used a cotton bud dipped in the solution to trace the outline of the stain. I needed to repeat every half hour or so , after about 3 or 4 rounds all was good. Some soaked in water marks took more . I wished I'd taken before and after shots but I'm a very pleased customer.