Engraving with CNC router - bits?

[Junkie]

A friend of mine has a CNC router that he's willing to let me play with to engrave various 7075 objects (maybe 4140 too).

Any recommendation on what bits to get? It has a 1/8" collet in it. He hasn't used it on metals, so doesn't know what to go with.

[kcstott]

They make standard single lip bits just for this stuff, Enco, MSC etc have them
I recommend 30 degree included angle cutters and maybe a hand full of 45 degree cutters