Rust stains can be removed with fine steel wool dipped in kerosene. (rismedia.com)
I've had white distilled vinegar and fine steel wool soaking in a mason jar for about four days now and it's still clear and the steel wool hasn't dissolved the slightest bit. (goldenboysandme.com)
After the final coat is dry, go over it very lightly with 0000 super fine steel wool. (healthhomeandheart.com)