Foam Question!

[Brand0n]

sorry if this has been answered, ive been a lurker on here for months but i just made an ACC today because i really wanted to see some photos =D anyways i was reading about the foam and epoxy and everything. As i understand it you would have sheets of normal styrofoam??? then you use a heat tool to shape it(i would like a name if possible pls) and coat it in epoxy (is it an epoxy spray or do you paint it on?) i know you can paint the foam then epoxy it but i was just wondering how it all worked, rightnow i have a 20G high for a crested gecko that i wanted to make a Palu but i couldnt afford anything bigger, ithas a 2.5 inch raise with a false bottom and it has a waterfall in it, HERE is a link to its build and pix of it!
anyways is there a direct guide or anything that im missing or is it all just compiled research?

Thanks in advanced

~Brandon