LBD, I just run minimal air assist and low power w/2 passes.
The veneer is taped to a raised glass window pane so the back side of the veneer doesn't get heat from the support.
I think a CO2 will heat the glass so that may be tough. I wish I could cut acrylic, but the diode passes right through. A CO2 will read the acrylic as opaque and actually cut the darn stuff.
After I glue the veneer to some plywood, I'll give it a sanding to level it out, but there isn't any cooking of the wood.