Is there a secret to using Oxalic Acid? We tried a side by side comparison with some 12.5 bleach and couldn't get the OA to do much. I purchased a 60lb bag and mixed it with water at the ratio recommended by the rep. We tried some stronger mixes but the "brightening" effect was barely noticable. It didn't seem to mix well in cold water. We're looking for an alternative to bleach for brightening wood fences, shingles, decks...
Appreciate any advice.
Appreciate any advice.