Just picked up a new to me black hawk 45 colt & bear-cat both in stainless. They look like they never have been cleaned (got a good deal) cylinder face, top strap are black with powder cannot see a spot of stainless anywhere. Need a good powder solvent to clean them up, I do not let my guns get this dirty. I think they are going to be ok after the clean up. Usually use hoppe's & a tooth brush to clean after shooting with good results. These seem to be past that stage, any & all idea's welcome