There is no need to use a steel brush for lead removal, as it may unnecessarily scratch the parts you are trying to clean. A standard soft metal or nylon bore brush works fine with the proper solvents. If you have a nickel or stainless gun (like your 686) a lead removal cloth will clean the rest of the gun, but it should not be used on a blued gun. Hope this is helpful.
I agree with the above 100%, use of a steel brush will damage the finish on exterior surfaces and when used in the bore of the barrel or chambers will do permanent damage. Use either a brass or nylon brush or a bore snake with brass bristles.
BTW, I once had to spend about 12 hours scrubbing the barrel on my 620 due to learning that ECM barrels don't work well with lead bullets the "hard way". In spite of the severe leading I didn't take any short cuts and used a brass brush to get the barrel completely lead free.
hydrogen peroxide and white vinegar 50/50 mix formula was given to me many years ago by a local bullet caster. Lead will "foam" with contact with this mixture! Be very careful using this with blue steel guns as it will cause carbon steel to RUST. I do use it on my 14-4 BUT I don't let it "sit" in the bore for long, as in when the foaming stops I run a dry patch down the bore. With S/S I just wet the bore again with a wet patch of the above mixture. Oh in case you don't think this works-take a teaspoon of each of the above and put it in a plastic cup. Add one lead bullet! Play fair and wipe the wax/grease off the bullet first.
I agree with the above 100%, use of a steel brush will damage the finish on exterior surfaces and when used in the bore of the barrel or chambers will do permanent damage. Use either a brass or nylon brush or a bore snake with brass bristles.
BTW, I once had to spend about 12 hours scrubbing the barrel on my 620 due to learning that ECM barrels don't work well with lead bullets the "hard way". In spite of the severe leading I didn't take any short cuts and used a brass brush to get the barrel completely lead free.