CNC suggestions for engraving aluminium plates for hot foil printing (fine details)

[magicniner]

Yeah, you could make the plates, but in most cases, not detailed enough for the plates needed for hot foil stamping.
I had to send camera ready artwork to get the plates made for me.

My current mill will engrave to 9 microns, what's required? :D

Given that Hot Foil is used for irregular outlines on graphics define the requirements because part of what you are implying is that the process is not accurate and requires some compensation in the stamps, which I doubt.

Also what is your CAD/CAM/CNC experience?