One of the last steps in the shop on any project is sanding. It can be a long, drawn out process to get the final shape and then smooth it all out but this drum makes quick work of it. Iuse a sanding drum on just about every project I churn out of the shop. It's great at getting in the corners and making sure all of the radius curves are smooth and squared. Here's a simple project to make your own shop sanding drum, which can be sized to exactly what you need for your project.
The design is pretty straightforward and easy to understand, read about the rest of the project here.