How to Remove Iron Stains from Wood
- 1). Strip the stained area of the wood of any finish or paint, using chemical remover and an old rag. Use a fine steel wool, if necessary.
- 2). Dip a sponge in lemon juice and sprinkle salt on the tip. Scrub the stained area to remove any iron stains.
- 3). Mix 1 gallon of warm water with 1 tsp. of oxalic acid, which can be found at hardware or drug stores, if the lemon juice does not remove the stain.
- 4). Dip your sponge in the oxalic acid mixture and scrub the stain. Use a bristle brush or steel wool for added abrasion.
- 5). Scrub the nail or other element to remove any rust, using the steel wool.
- 6). Pour the mixture into a utility sink or tub. Rinse away any residue on the tub and bucket with plenty of water. Fill the bucket with water.
- 7). Dip a clean sponge in the fresh water and wipe down the stained area, rinsing away the oxalic acid. Continue wiping and dipping a number of times. Use a dry rag to remove any moisture from the nail or hinge to prevent rust.
- 8). Apply new stain or paint on the previously-stained area, once it has dried, according to manufacturer instructions.
Source...