I use 93% alcohol as a neutralizerDown to my last bit of Neutralizer and can not find my old recipe. Not sure it is always needed but one of those things that have been a habit and have served me well. After cleaning carbon and copper with various bore cleaners and prior to tad of Kroil and dry patches at end. I have been using a neutralizer that as I recall had Hydrogen Peroxide as an ingredient. Thanks a bunch for any recipes or tips!