I have recently installed a brand new keymark X4 system on my home... yes the one with the sidebar.

As I understand the medeco/keymark keys are made of a hard nickel silver alloy... what do you locksmiths who service medeco/keymark X4 use to mark your keys... In other words, do a certain brand of key stamps make a better impression? Also, on that note what should I use as a stamping plate?
Thanks,
Ivan