It is important to note when sandcarving wood surfaces to use aluminum oxide abrasive in place of silicon carbide. The silicon carbide is a reflective product and if any grit is left in the wood grain, it can reflect through the paint. The recommended blasting pressure with 5 mil is 40 to 45 psi or 6 mil at 45 to 50 psi.
-Liz Haas, Rayzist
