I want to thank Cermark Support for answering questions on 17.4 Hardened Stainless Steel. I did get several good tips that I want to pass along:
1. The obvious tip - CLEAN the metal. This may seem too obvious, so don't over-look it!
2. If you can't get good bonding at 5% speed, then slower is not likely to help.
3. Hard to mark metals - Brass, Aluminum, 17.4... Preheat with a heat gun (not too hot).
4. Raise the DPI/PPI.
This could be a good knowledge thread - Please continue the list with other hints.