I have used Hoppes No. 9 with good results, too. But a few years ago discovered a product called G96 Complete Gun Treatment. It is touted to clean, lubricate and protect. I have found it does all three very well. In fact, I now use it to lubricate door hinges, locks and like items on my vehicle, too. Remington makes a very similar product that works with equally well results. Both these products are effective on removing modern powder residue and cleaning the working mechanisms and bores in rifles, revolvers and automatic pistols, they do lubricate and protect very well when used in my modern firearms. I would expect the same results from an aged piece.