Welcome to another one of my custom action figure tutorials. This week I'll show you how to fill gaps in your custom figure in under a minute using Super Glue and Baking Soda. It's quick, easy, and most importantly extremely durable! All you need is any brand of liquid Super Glue (I like Future Glue from the Super Glue Corp) some baking soda, (talcum powder also works) and sandpaper.
Alternatively there's also a product out called '5-second Fix' which is a UV resin that cures with a little light. You can use that to fill gaps as well!