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.