its like $4-$5 a can its worth it if you dont want it to collapse
its not recomended that you use it on all the armor
the helmet is the best suited application
mabe the chest
keep in mind you dont want to pump it full
the stuff expands
was thinking about triple layered paper, then fiberglass resin it, i couldnt find great stuff at home depot i asked a guy and he said they didnt carry it, but they did have an alternative same thing as great stuff except $18 a can.
i just tested out posterboard, the one that sells in 5x5ft, i just out a piece 8.5x11inch, and well the printer took it in just the photo i printed is a little smeared, and theres thin white lines all the way down it