The finished surface will be close to the base of each of the steps -- I was trying to have all of the pieces have an excess of material. The car is "hidden inside" the stacked layers. ;-)
So yes, I will be making a lot (more) blue dust. My little (2 gallon?) shop vacuum gets filled up after cutting about 4 or five sheets in the CNC, and sculpting the steps off with a Stanley
SurForm (the rasp made like a cheese grater) will make a lot more. I'm thinking of rigging the SurForm to the vacuum hose will save me a LOT of cleanup afterward.
I'll be doing a lot more gluing today!