Ecoxall Oxalic Acid for Wood Bleach - 99.9% Pure Fine Powder - 2 lbs - Highly Effective Multipurpose Cleaner - Used as a Wood Stain Remover and Rust Remover - Industrial Grade Strength

This cleaned that toilet in 20 minutes, I didn't have much time left as I was getting off work, so I had to rush in see just how well this,was going to work? And it cleaned so well , in such a short amount of time added in warm water to the mixture and made a paste and blotted it on to the stain.

Great product. Removed all water rust stains on the house from the sprinkler system. Used 1 cup in a gallon of water. Used a paint roller to apply. Let it sit for 15 minutes, scrubbed just a little bit on spots that still had rust. Then rinsed with clean water and all rust was gone.

Just had a new Denya counter with an oil finish put in 6 months ago. Had some metal canisters on the counter and a metal cup. Water was spilled on the counter and seeped under the canisters and cup. The metal reacted with the water staining the wood. I tried some home remedies first and nothing worked. I was terrified I'd have to call the installer to come out and sand it out. With nothing to lose, I decided to try the oxalic acid. Only giving 4 stars because it comes with no directions, usage guides, or precaution literature. It's an acid, it should come with some warnings. Anyway, I found some easy how-tos on youtube. It worked crazy good. Just applied a little of the solution, let it sit a minute, then rinsed. The counters look great! I did lightly sand some of the areas to see if that made a difference, it didn't seem to. But all the youtube videos say you should sand if there's a coating on the wood of any sort. As a side note, I poured the leftover into an old bathtub that had rust marks and it took those off too.

Worked amazingly well!

Decent price. Arrived timely. Did what it's supposed to.

This did a great job lightening up the wood for refinishing furniture. The color came out even so I was able to stain rather than paint.

Worked as advertised. Good price, good product.

Excellent product for removing rust from bike parts as I purchased it for. Product has many uses like bleaching wood but mixed properly with water and submerging rusted bolts or even larger chrome bicycle frame rust dissolves rather quickly in about 24 hours with two separate applications.