Skull Caps

For elk antler mounts I use a foam mannikin from WASCO/McKenzie and two part foam over the skull plate and rasp to match the form. I do this so it won't weigh so much. Spray foam might work. I have never tried it for this. On deer, I use fast set mache'. Sorry George, just used to doing it this way. George will say Bondo!

 

The thing about foam is you have to be able to judge the expansion. Foam isn't the easiest to remove from antlers. I always taped up the burrs and main beam with blue tape a little ways. Bondo is easy to get it close to the shape you want, it dries hard quickly, you can shape it with plastic sheeting and/or a water wet gloved finger. You can trim when it is in the gel state and rasp and sand when it is cured.

The only advantage to foam is the light weight. It is probably more expensive than Bondo also.

 

I used to hot glue little blocks of foam for filler.