Quote Originally Posted by karlej View Post
As pointed out vintage restorations are a bit different. Hard rubber and celluloid do not like heat. Belt grinding the pin head would generate enough heat to melt the collar into the scale material. Modern materials like acrylic are similar.
I think that depends on the belt. I use ceramic belts and I throw them away when they get dull. With fresh ceramic belts you don't get heat development. At least not in the amount of time needed to remove a brass pin head. I've tried this with a worn 240 belt as well and then you do get more heat.