Lead Away cleaning cloths are slightly abrasive so I would avoid using them on a bead blasted finish. What I've been using on my 625 JM is M-Pro7 cleaning solution and it's worked very well. So well that I'm a bit shocked at how easy the 625 is to clean up, compared to the full polish on my 610 the 625 cleans up like it was coated with Teflon. However, the face of the cylinder does show signs that it's been used because the carbon in this area defies anything except the lead away cloths, which I won't use on the 625.