I use a special etch cream like "armour etch" (pretty acid). The result will
https://www.techjunkie.com/export-gmail-messages-text-file/e awesomely artistic and neat. Summary: 1) cover the target surface with some black nail polish 2) let it dry; 3) engrave with a laser; (black layer will terrifically help) 4) apply an etch cream layer on it; Wait for a while (a matter of minutes) 5) wash with some acetone-like product et VOILĂ€! Beautiful and neat! You should give it a try...

Etch Cream





Z axis
   Cronos

Clamp

Ortur( faster finer power control)  vs Neje (not open source)

Ebay
Ortur
Lightburn
Gimp
Plugin

Tutrorials
Gimp
Lightburn

Ebay Height Adjuster

Link
Link High


Lifting adjustable focus bracket

z axis cnc laser