[puddleglum]

I have used white glue to make a barrier before with good success. You might want to try the resin over some scrap pieces that have been coated with glue or paint first, just to be sure you like the result. Awesome job on sculpting the foam. Making the other side to be a perfect match might be harder than the first set though. I'm no expert, but from what I've read here, air flows off of sharp edges better than rounded ones. You may want to square off the ends of your rear mold or give it a sharp edged reveal at the back like the new Prius. I'm looking forward to seeing the finished result and hearing how they function. I'd like to do something similar on my car someday.