Here's what I did. So far the paint holds up pretty well. Some areas I just roughed up the original paint and it has chipped where tools make agressive contact...such as the stand lip/tray.
....shoptask 3/1 lathe/mill assembly and mods
I don't think I would powder coat the machine in an assembled state....assuming you've removed all the materials that would be affected by the heat, all fitting parts and joints will need to be somehow parted to disassemble if coated while still partially asembled. I don't recommend powdercoating a machine such as this......but, others may have done it.