No, not like delamination. Fisheyeing ruins your surface, because the resin doesn't stay flat. Google it for pictures, than you will understand. Where did I mention delamination? I guess you meant my opinion to the tinfoil barrier? My concern here is, that the core isn't bonded to the tinfoil, and therefore the core isn't bonded to the laminate either. That way, the foam doesn't act like a sandwichcore, wich would be beneficial for your application (sandwich= good).
If you use epoxy, you don't need a forced ventilation, but a stable room temperature. If you are working with polyester,  you'll need good ventilation, but temperatures could be lower, to a certain degree.
Are you aware, that this would be a really expensive project? you should definitely try to build something smaller with the same techniques, to get a feeling for that kind of work. Especially when working with epoxy.

Sorry @oekmont

Warren had posted that '
I've just googled and see seen what you're referring to now and understand.

Your point about the lack of attachment to the tinfoil, and hence core is a really good one. One I hadn't realized before.

Do you have any thoughts on epoxy vs polyester, given I may have to space out work on weekends? Would the polyester (unwaxed) allow me to come and add layers a week later, better than epoxy?

Regarding price: I know it will cost a lot. I've just graduated art school though and this is a big opportunity for me, as 1000s of people will see over the 6 months its out this summer. I am therefore committed to making it happen, and appreciate all the feedback you and Warren have given me doubly so because of it!  (ps. price and temp suggest polyester)

You want to stick with one or the other.  Polyester can be applied to older layers after a week or so no problem, just give it a good key with sandpaper and a a clean.  Epoxy is the same in essence, once hard, a key and clean will allow the next layer to bond.

I would be concerned about budget and work environment.  If you are restricted on budget and stuck in a cool workshop then  polyester resin may be a better  choice due to cost and being less temperature sensitive.


Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

If you go the plywood polyester router, you should be done after one session anyways.

Thanks again gentlemen.
I appreciate you both taking the time to answer the rookie questions.

I'll follow up with some images later as I get going.