I cut and engrave 1/8 luan 2-3 days a week. It cuts fast, I use a slightly higher and slower setting than I would with 1/16 plastic or about the same as filon (smooth sheet fiberglass). I have no problem with either voids or delamanination. We use about as cheap a grade as we can get away with. Engrave with about twice the power as you would plastic and you should like what you see. If you have a cabinet shop in the area 5/32 birch, cherry, and maple scraps also engrave nicely. For test pieces scraps and odds and ends sometimes end up specialty proto types, watch who you show though I got stuck doing 600 Conastoga wagon wheels one time cause I said that I could come up with a design for someone else.
