Bronze wool, which is probably still available from World's Largest Supplier of Gun Parts, Gunsmith Tools & Shooting Accessories - Brownells , is about as good as steel wool, and won't harm the bluing. Some types of blue, and some types of steel, will resist steel wool less than others. I wouldn't, for example, trust bluing on stainless steel, which can still rust if abused.
If you feel you need a chemical rust remover, I would use naval jelly after painting around the rust marks. Then you would have to reblue the cleaned area with something. It will certainly remove bluing down to the bare metal.
If you feel you need a chemical rust remover, I would use naval jelly after painting around the rust marks. Then you would have to reblue the cleaned area with something. It will certainly remove bluing down to the bare metal.
