ok dudes, my test results... this is after 48 hours of curing. It is a 6mm foam sheet sample:
Clearly I'm doing something wrong. let's get some brainstorming going! Let me say I feel like it can be done, and I'm NOT trying to debunk this method, actually quite the opposite I only want to DUPLICATE it!
what I'm thinking:
1.) I used a different brand of primer filler (rustoleum).. surely not the problem I hope...
2.) I didn't heat set the foam well enough? I did two passes with a hot hot hair dryer, letting it cool between. I did see the sparkles when I finished, but then again I saw some in the foam before I even hit it with the hair dryer
3.) It was too humid in my garage when I did it? I don't remember what the temperature was, but it was within the ranges listed on the cans
4.) I would say I'm not letting the layers dry long enough or something, but I know a guy who is successfully pulling this off letting it dry for way less time between coats
5.) here's what I did: heated 2x, Mod 3x, Plasti 3x, Adhesion promoter 2x, Filler primer 2x within 10 mins of second coat (per can instructions), 2 coats of Duplicolor Barcelona Red Metallic, and finally Krylon triple glaze 2x.
Comments? Suggestions? what factors do you think would cause problems with the cracking? I'm dying to get it right! Thanks in advance guys

thumbsup
EDIT: by the way, 2 thin coats of 321 on top of PVA flexes a decent little amount without cracking, but does crease when flexing inward. I posted pics in my Mk iii WIP so as to not take over this thread completely haa