Here's an idea for you guys to try out..... Ever use liquid styrene to do some patch work???? Cut up a bunch of leftover sprue into pieces less than a 1/4" long.. (use the same sprue from the kit your working on) and roughly the same amount in lacquer thinner in a glass jar and seal it... I used a 1/2 oz Testors jar for this.. if it still acts like a liquid, add more pieces of styrene into the mix till it thickens up a bit... I haven't used it yet, but I'm sure you'd want to apply the stuff using a tooth pic.... Try it on scrap parts first and see how it works....
I also thought about casting my own parts with this mix.... ?