I just bought a blank revolver to use during dog training. Typical starter pistol, cast pot metal. Black powder is very corrosive, so, how do I clean the pistol after using the black powder blanks? Will running a .22 BoreSnake through the cylinder with some Hoppes #9 do it? The barrel is partially obstructed down its length, so, an occsional .22 brush is the plan there. All suggestions are appreciated.