I must admit I had mixed results. I used a scraper to first remove the top finish, polyurethane I believe. On the lighter darkened areas stained by a leaking household cleaner, the Oxalic Acid seemed to work. However the almost black areas only lightened up. I used both a hot bleach as well as a cold bleach on these areas. I finally resorted to the scraper to get rid of the stain on the oak dining table. I then stripes the entire table top, sanded it, and applied and oak stain to match the original color. Toped it off with three coats of polyurethane to achieve a "factory fresh" finish worthy of anyone's dining area.

I was amazed at how quickly and thoroughly this worked. After trying several other options in an attempt to restore my badly damaged wood floors, this was amazing. One thing to note that I learned is that you need to neutralize the acid after you use it by rinsing with a Borax (or similar) solution. I did not do this and my polyurethane peeled up in the areas where I used this acid. A salt type substance came up through the stained floor and poly. Once sanded down again, restained and polyed it looked great! Thank you.

The thing I liked best about this product was that it Worked! I never tried to redo a wood floor before and when it came to the dark stains left after sanding and trying everything else suggested on the internet, I finally found this oxalic acid. I had even asked a supposedly professional floor refinisher and he didn't even know about it. So I bought it from this website. I think if I had to do it over again, i might try a little weaker solution and maybe it wouldn't have gotten quite so white, but better a little lighter spots than darker spots when finished.

After stripping our oak bar stools we then carefully followed the directions for the wood bleaching process. It didn't really bleach the oak, but rather it brought out white streaks everywhere that looked like white paint. No amount of sanding got rid of the white streaks. We saved the project by going with a darker stain...and the whole reason we did the wood bleaching was to get lighter colored bar stools not darker ones. Would not use this product again. Lots of work for a disastrous result.