NO.
DO NOT make a gareeeeee budget pack. he has to constantly repair it because it consistently always falls apart(he updates after every event he wears it to about what he needs to repair, thats not a lead i would want to follow). not to mention they look ridiculous because they are made from electrical boxes with very little modification to them and glosticks.
if you want to go the budget route,
go the ORIGINAL budget route and
follow Norm Gagnon's plans, who, is someone the majority of the ghostbusters community has unfortunately forgotten, thanks to shell sellers and
gareeeeeeeeee's empty promise of a
"budget pack", which
is more like that movie with tom hanks and that house he was trying to repair but it kept falling apart and spending money to repair the stuff that he had fixed which originally cost him
A LOTmoney and hilarity ensued but not the funny kind, you know "the
MONEY PIT"? that one.
Norm's pack, is budgetly accurate, stable, consistent, and reliable. ive built SEVEN, let me make that larger
7 (SEVEN) packs using his plans. if i hadnt gotten more experience with scratchbuilding and the tools to do that and want a slightly closer degree of accuracy, i still would be using my dog eared note covered yellowed paper norm's plans.
i'll save you the digging:
Norm Gagnon's Prop Plans - Equipment - Ghostbusters Fans Wiki
when there were no plans, norm made them. that page is filled to the brim with ghostbusters prop history. cripes, he COINED the phrase "ghosthead." as a fan of ghostbusters.
this message is for ANYONE contemplating a proton pack and someone linked them to gareeeeeeeees plans.
as for the bondo covering the polystyrene i dont see it being a problem as its plastic. i may have some concern how it would react to foam, but then im more willing to risk a little to see if it can do what i want it to do.