Ouch, it makes sense when you say it but I probably wouldn't remember to add something to grip either.

Ok, I followed your advice and it worked! I posted pictures in the photos section.

Nick, in regards to the silicone skin not sticking to a vertical surface very well when you paint it into the mold, have you ever tried mixing cabosil powder in with the silicone for the first few painted layers? I have never done this but am running into the same thing you are. It tends to pool at the bottom of the mold and ends up extremely thin near my seam-line. If anyone has experience mixing cabosil with a soft plat-cat silicone, I'd love to hear about it.