There is no difference in the stainless steel used in either matte finished or shiny guns. The matte finished are just bead blasted. You can polish them to look like non matte finish but it takes a lot of elbow grease to do it. It is a lot easier to bead blast the shiny guns to cover wear and small scratches. I do this for my dealer and I have also polished some stainless guns also, lots more work.