Bought a belt-sander and spent about an hour on the laser gun with the coarsest grit. It's now about half-sanded. Was a lot of fun, except getting covered in fiberglass dust that itches like crazy. No pics--too dark. Will post once it's all sanded.
I do like the belt sander a lot (Craftsman!) and will enjoy the rest of the sanding. Was worth selling my Xbox games for it. :D