Originally Posted by mc_n_g  Make sure your inserts are ground or polished style. If not I doubt you will get the finish you want. Pay the extra money and get insert for aluminum. They should have a sharp knife edge to them not the pressed edge for insert used on steel. |
I agree here. don't use coated anything, all edges
must be sharp.
TIP
If you are on an open machine, try a
little spray of kerosene to stop the built-up edge happening on the last cut of each face