To add some more details, though I don't know the whole process the whole way through,
it would entail:
1) acid dipping;
2) micro bead blast
3) PVD coating
If ou prefer RBJ's go ahead with that, after the "blowing the dust off the dial" I've always been wary with that one.
Originally, I'd planned to ask finepics to get my 028 PVD'd as well as a Jimmy case project, but as this is not possible (and he was chargng around $110-120 I think after arranging a repeat deal) I want to finally get it done. The problem is one single piece is $170-200, but with more volume there could be scope to get it cheaper, it just depends how many.
Willith, I think you are in Australia (am I correct?) so getting your handgun done should be fine. I would be wary of sending it overseas, but you would know more about gun laws etc than I will.