Layering, gluing, and sanding insulation foam
I'm building a big dinosaur-skull helmet out of blue insulation foam. I'm building it up out of several layers, and it's taking shape nicely, though it still looks blocky like something out of Minecraft. I've got maybe one more evening of assembling the base pieces before I start sculpting in earnest.
Any tips on gluing the layers together? I'm concerned that the glue will be much more resistant to sanding than the foam. I don't want to end up with a striated look, with ridges running along the glue lines between the layers. I'm thinking I should use white Elmer's glue - strong enough to keep the layers intact until I reinforce the outside with paper mache, but soft enough that I can sand and file it.
With the outer layer of paper mache, I can disguise any sanding ridges somewhat. But I'd prefer to get it as close as possible before starting that step.
I guess I can trim down any objectionable ridges with the hobby knife, but I'm sure there are some better tricks out there.
I've used Liquid Nails in the past for a prop out of white bead foam (ugh) but that was a wide, flat axe with minimal sanding needed along the glue lines.
No reference pics, it's an original character.
Last edited by nathancarter : 07-08-2013 at 11:49 AM.