Hi ReelSore,
first off, the Vaseline has to be a very THIN coat, otherwise it turns the GS to jelly. I tape over the insertion hole once I get the foam sprayed in there. You are correct about the 2/3rds fill. After I get about the first 1/3 of foam in, I tap the skull, face down & towards the chin, to help fill in the detail areas, fill the other third, then tape up the hole. I let the skulls cure face down, in the house, about 3-4 days before I demold them, just depends. Sometimes it's longer-temp plays a big factor. Too hot and it's a mess-found that out when I mistakenly thought they would cure faster outside in our 110 degree summer heat
I prefer to use Great Stuff, and NOT the large crack variety..for some reason, that doesn't come out as well for me, but to each his own. It does take a little experimenting, and even then, they don't always turn out.
Added a few pics of the ones I've made. The last batch didn't turn out-too many air bubbles and not enough tapping Hope this helped~good luck!
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![Head Art Eye Human Skull]()
![Skull Bone Head Anthropology Jaw]()
first off, the Vaseline has to be a very THIN coat, otherwise it turns the GS to jelly. I tape over the insertion hole once I get the foam sprayed in there. You are correct about the 2/3rds fill. After I get about the first 1/3 of foam in, I tap the skull, face down & towards the chin, to help fill in the detail areas, fill the other third, then tape up the hole. I let the skulls cure face down, in the house, about 3-4 days before I demold them, just depends. Sometimes it's longer-temp plays a big factor. Too hot and it's a mess-found that out when I mistakenly thought they would cure faster outside in our 110 degree summer heat
I prefer to use Great Stuff, and NOT the large crack variety..for some reason, that doesn't come out as well for me, but to each his own. It does take a little experimenting, and even then, they don't always turn out.Added a few pics of the ones I've made. The last batch didn't turn out-too many air bubbles and not enough tapping
Hope this helped~good luck!
