Instead of filling hollow parts in vinyl kits with plaster or expanding foam, I use hot glue sticks. After heating, I pour the glue into the cavity; it instantly fills, and it’s lightweight, too. Another advantage: If you have a misshapen part, fill the interior with glue; while it is hot, the vinyl will soften enough that you can bend it back to shape and hold it until the glue cools. The vinyl will hold the new shape after cooling.

Tip submitted by:
Brad HairBroken Arrow, Oklahoma