Excellent post by Steve! Two things I would add is that a yardstick that's tapered to look like a builder's shim works great for getting cowling molds separated, and since PVA is water soluable, standing the cowling up on end and pouring water into the partially separated part/mold will dissolve the PVA and make part separation a lot easier.
Mark Langford, Huntsville, AL N56ML at hiwaay.net see KR2S project N56ML at http://home.hiwaay.net/~langford
