I haven’t tried the orange pumice based hand cleaner mentioned, but I added it to my “wish list” of stuff to buy for the 
to give it a try once it arrives and I do some engraving.
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Here are some pics of my truck card-holder prototypes, one unfinished and one sandblasted with harbor-freight black aluminum oxide (and colored with markers on one side):
I have a harbor freight blasting cabinet, and this was done using the stock gun at about 110 psi. My thought is that the black oxide is great for “weathering” and muting the sharp laser lines, but way too dirty to “clean” light wood.
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Oh wow! Now I want one!
A late-70s chevy, slammed and bagged?
I know a guy…
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No, silly. A blasting cabinet!
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Is that just the 70 grit? I use the 220 or higher for glass… wonder what that does for wood char? (HF doesn’t carry that grit anymore - used to with their air eraser)
Yeah, that was with the HF 70 grit. They still carry the air eraser, but I didn’t see blast media refils for it on the shelf.