Had to go do snow clean up. On my way to get the BLOnow. With Regards to metal- thus far I am again doing just toothbrush, small scraper, and oil. I have some people go crazy with barrel cleaning. I plan to just use a rod with oily cloth rag and run it through many times. Some people say to avoid copper or brass brushes. I don’t have one that fits anyway. I have one to fit my .556, but the .308 one fits initially, but has a wider portion that won’t. To clean the barrel entry I assume. Scotch brite perhaps?