Oxalic acid is sold in crystal or powder form at ... Jellied rust removers such as Naval Jelly will also remove rust stains from concrete, but there is likely to be some roughening of a smooth ...

never use metal with oxalic acid. Apply it to the stains with a paintbrush. Let it stand for a half-hour or so and wipe it off with a clean, white cloth dampened with white vinegar to remove any ...

I tried bleach and a chemical remover to no avail. Can you help? A: Rust stains on concrete seem to respond best to acids of various types. The classic treatment is oxalic acid, which is sold at ...

To remove hardwood floor stains ... Crew recommends a few solutions. “For darker stains, try oxalic acid crystals dissolved in warm water — they pull the discoloration out without damaging ...

Meanwhile, deeper stains may also need a bit of isopropyl alcohol to lose their grip on the hardwood fibers. Oxalic acid is yet another readily available cleaner that neutralizes rust stains ...

Light-colored stains can be cleaned by applying a solution of 1 pound oxalic acid powder ... the surface evenly with a muriatic acid solution. The acid will remove a minute layer of concrete ...

The secret is oxalic acid. Found naturally in rhubarb and ... I keep it handy in my laundry room to remove rust stains from the inside of my clothes washer. No big deal. I see a spot, I hit ...

If oxalic acid doesn’t remove the stain, try applying chlorine bleach to the stain and letting it sit overnight. If the color lightens some, but not sufficiently, repeat the process a couple of ...

So if the stains on your floor consist partly of buildup from dirt that’s been tracked in, tannin removal might be what you need, too. In a concentrated form, oxalic acid is powerful and toxic.

Bleach diluted with water can remove more stubborn stains or disinfect the surface, and vinegar is helpful for dissolving ...

Soak a clean cloth with hydrogen peroxide — the 3 percent solution you get at the drugstore — and lay it on the stain. Leave for several hours or overnight. • Zud and Bar Keeper’s Friend are cleansing ...