Abrasives and Sanding
Sand uniform curves on your spindle sander
If you think "abrasives" means strictly sandpaper, you've only scratched the surface of what's available. Here's a sound sampling.
Some sources recommend sanding wood only to 220 grit. Why not keep going with finer grits and make the surface even smoother?
Use this handy, easy technique to see if your disc-sander table adjustments are squared. It's a quick way to make your disc-sanding superior.