Started my own casting today, amazing stuff, I can't stop casting all my shit. I must have made 30 alternator skids heads.. lol. Anyway, at first, I was having problems getting bubbles in the face, especially at the wrong spots (ie nose/chin) When the resin is curing, bubbles form.... I looked online for solutions and tricks, many "pros" recommended vacuum boxes, though they are costly. Some others recommended vibrating pads or surface. One even showed a "do-it-yourself" process which seemed cheap and simple. I looked around for ideas. Found none. Then I listened for ideas, and it struck me - My computer's speaker system has a subwoofer box which when lots of bass is coming through it, it vibrates wildly. I put a mold on there and pumped up some Metallica (example) sure enough - ZERO bubbles. A few minutes ago, my girl was doing laundry. While the laundry machine was going, I set a mold on top of the machine - NO BUBBLES! thought I'd share this with you casters out there.