Thanks havok1919! Been wanted to do this and have been waiting for some extra funds and a good tut. Found the tut now need the $$. Maybe I will find some X-30 in my stocking this years?
Really great job and closer to what I need for my particular application. The Plastic skulls look like great quality. But I need quantity and I need to cut them to hang in our catacombs area.That is some awesome work. You can never have enough skulls! These are some that I'm working on right now. About 20 peices. This isn't everything, just whats currently on the dining room table. (Wife wants her food table back!!!) These are all paper mache' and aluminum foil without the paper. My own extra thick mix. A good example of very cheap... Cait
I'm unclear about the difference between Great Stuff and expanding foam. I sprayed GS into a sand mold I had just "dusted" with WD40. Spraying it level with the sand resulted in a back half-globe that could be trimed to meet my purposes. I cut the back of the skull at different flat angles to mount them "looking" in all different directions. The finer the sand the more real looking, but my application used black painted skulls with LED eyes in most cases, so rough sand worked great and was quick to reform after each batch dried. FWIWI'm doing this for sure. Can I use just foam instead of the plastic to cast these? I'll definitely be going with an expanding foam (not Great Stuff), so I'll be pricing out the products. Thanks for sharing!
I've not used the Smooth-On foam, but the Tap Plastics stuff gets pretty warm too. Do you have a vent hole in the board on the bottom? (If not, I'd add one-- maybe ~3/4" or so-- and see how much foam comes out.) Maybe you've got too much foam and pressure/heat is building up and cutting back to 3oz or so might be better.I found that the bottom of the mold (top of the skull) appears to get very hot during the expansion and it bubbled up quite a bit. [...]Any ideas?