ORIGINAL: combatpigg
Thanks, Ccat. I didn't have the foam prepped as good as I could have after the primer coat of resin.
but if you already had a thin coat of resin on the foam, then there should not have been much foam for the next coat to interact with. The heat from such a thin layup would be very, very minimal and I would expect that the ingress of air was due to a temperature change in the area you were working in rather than the exothermic reaction of the resin.