Acetone on foam always makes it dissolve. It will be uneven. Sanding might be Ok if the foam particles are tiny. But I know that theaters carve foam with a hot wire. Low voltage across a fairly fine piano wire bent into the shape you want.
Foam Carving Test
I had the wrong bit but I tried anyway. I figure I can either hit it with a heat gun to smooth it out, OR maybe spray it with a light mist of Acetone, or MEK ??? Or I could put some Acetone on a cloth and rub the surface to smooth out the foam. This one was just a TEST carve. I will figure out the best bit and cut speed, etc. and then make the real tombstones, that will be sprayed with the stone surface paint to add some realism.
Joe
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Joe
