The burs wear of a bit faster, but I use carbide burs, I have to replace them only when I break one by hitting it against something.Arnaud Van Tilburgh 07-31-2014, 08:27 PM
Like Sam says I even put mine in nitric acid to no avail. I do wash mine once in a while.jerrywh 07-31-2014, 08:00 PM
Yeah I bought mine from ray cover, and its well used. Slick like a mirror.Jared Eason 07-31-2014, 07:28 PM
Ah, there is a way... involving a hot acid bath in a spray booth system.
Used to be a lapidary guy who would make 'em like new for $20.
There are also flat lapping machines used for...