I am going to cover a fuel soaked airplane, so I searched RC Universe for ways to take the fuel out of balsa. In many of the posts, kitty litter was suggested to dry fuel out of the fuse. A couple of years ago, I was in a thrift shop and noticed a coffee grinder. I bought it , took it home, and ran some kitty litter through it. It came out extremely fine and easy to work with. Perfect for getting into corners of airplanes for drying out the balsa. Also can top off that urn of Aunt Erma's ashes if it gets a little low.