Ecoxall Oxalic Acid Fine Powder, 99% Pure, Multi-Surface Rust and Water Stain Remover, Wood Bleach and Brightener for Decks, Hardwood Floors, Furniture, 10.1 lbs (160 oz), Pack of 1

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.

Worked as advertised. Good price, good product.

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.

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 great on toilet

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.

good sale. price was right. delivery fast. no problems.

arrived on time, as described, no surprises, time needed to evaluate effectiveness of product, but it was recommended by other beekeepers.