Sent from my iPhone On 2013-05-13, at 10:08 PM, veegee wrote: > On 2013-05-13 8:57 PM, IVP wrote: >> I'm guessing you'd need to let it cure properly so the hot metal >> doesn't heat any remaining free water and crack the mold >=20 > This is a well-known procedure. I'm not inventing any new methods. After > the plaster hardens, it is to be baked in an oven for a few hours to get > out as much water as possible. Then it's safe to pour liquid aluminum > into it. You will not get even close to the original positive in terms of quality/fi= nish. Finish is important with any mechanical part and any roughness or voi= ds may well lead to troubles quickly. If it was that easy, nobody would sand cast and then machine metal parts.=20 But prove everyone wrong (safely!) and post before and after pics. :) -m --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .