i have been using jb bore bright for lapping, polishing and if you can believe it i have found a way to sharpen knifes with it. it seems to be a once a year kinda job but dang does the stuff work great, i used it on my muzzleloader and the thing loads with about half the pressure it used to take. i havent been able to get my hands on the cleaning version of it but im waiting till the shop gets it