CO2 blasting is good for areas where savings on cleanup would offset the freaking $$$$$$$$$$ cost. No media to clean up but there is still the removed substance to deal with. CO2 is not as agressive as inorganic sand type media but does not produce mesurable point of impact heat so it might be good for stripping thin sheet metal rather than walnut shell. Soft materals are not cut well by media blasting. Stone cutters cut rubber sheet for stencles (How the heck do you spell that?) The media bounces of soft stuff but chips away at hard or brittle stuff.
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