As I'm working on my son's Halloween costume, I have tried a few different build materials. I started with normal card-stock pep w fiberglass and bondo to harden and smooth the pieces. Recently, I created my son's Ironman neck seal out of 3mm EVA foam. This worked very well, and I decided to build the arms in the same material. However, I want the final arm units to be hardened.
So, I planned to fiberglass the 3mm foam, smooth any minor roughness with glazing putty and then sand them smooth before priming and painting them.
Last night I took two early 'test' pieces out and apply a liberal coat of fiberglass resin to the outside of the pieces. This morning BOTH pieces were still VERY tacky (if not out right wet). Resin that had dripped on the working surface had completely hardened, so I know the wetness isn't due to my mixing the resin wrong.
This afternoon I re-tested it and it's still tacky (although maybe slightly less so). Also... neither piece is very 'hard'. The whole piece still 'flexes' a lot. This has me wondering if there is a specific issue with the resin in combination with the closed-cell foam.
I'll include two pics just for kicks and giggles (since you can't tell anything from these really)...
So, has anyone had any experience (good or bad) with Fiberglass resin applied to EVA closed-cell foam pieces?