- 1). Put on rubber gloves and eye protection. Be sure to wear a long-sleeved shirt and long pants.
- 2). Mix 1 lb. of oxalic acid with 1 gallon of tap water in a large plastic bucket.
- 3). Mop the rust stain with the acid mix and allow it to set for two hours.
- 4). Scrub the acid into the stain vigorously with a stiff-bristled nylon brush.
- 5). Rinse the acid and rust away with a garden house.
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