I just picked up a Ruger SRH in .454 Casull the other week. I've been shooting 250gr hollow points and 300gr flat point bullets through it. I really love the gun. I have a question however about cleaning this gun. It has the target grey finish. Now I'm really picky about getting my guns really clean On the cylinder face there are rings around each chamber, I guess it is just the powder residue and etc. I know I will probably have to live with these unless there is a way to get them off. I now just scrub them good with a toothbrush dipped in Hoppes #9. Does anyone know how I might get these rings off? Has anyone ever tried Flitz metal polish? I'm wondering if it would hurt the finish. Thanks