I've been struggling with getting a clean burn with my CO2 on the black finished KaBar knives. Using my 40-watt epilog mini, it took about 5 runs and then a trip to the buffer to get anywhere near an acceptable engraving. It still looks a bit blurry and "over-exposed" with the loss of detail. See the photo.

Anyone willing to share what's worked for them? I still need to run about 5 more blades and would like them to turn out better. I've got both 75-watt & 40-watt machines (don't ask me why I started with the mini?)

Ka-Bar1.jpg

Thanks for any input