I see 4 spray cleaners at Walmart. Gun scrubber, gun medic, clp, and powder blast. Any particular advantage one have over another? None damage the blueing right? What about the factory plastic grips on my 96fs? (gun scrubber says may harm finished surfaces or plastics.) Most economical per ounce are gun scrubber and powder blast- big 10 or 12 oz. cans versus dinky 4oz cans of others. Do you use these on the bores (inside of barrels) too? Or you buy those separate jars? Seems like dipping a brass dirty brush in a jar would contaminate it fast.