I was at an airshow, and a guy had sprayed his ENTIRE aircraft frame with the foam that hardens, then put bug-eye lights up front, and painted it green/blue. It was supposed to look like a Frog, and it did! The more amazing thing is, it actually FLEW as well! That foam was heavy after you added it all up. But the effect was startling, to say the least. It was really popular with school kids, the guy took it around showing it on a trailer most of the time. I didn't get to see it fly, unfortunately. Ok, so foam may not work inside a Gremlin...not that kind, anyway. How about covering it in velcro, then you can stick whatever material you want to it? easy to change interiors, too! Or you can flatten your favorite drink cans, and "tile" the inside with Pepsi, Coke, Coors, Bud, etc. Now, that'd be neat! Beads could work, but it'd be time consuming to string them all and hang them. Ok, that 's enough for me... Jerry