Sometimes, you just can't get into a tight curve or follow an irregular edge very well when sanding.
shop tip

Grab an old, dull scrollsaw blade and a piece of sandpaper about three-fourths the length of the blade and 2" wide. Wrap the paper tightly on the blade and secure the ends with thin strips of plastic electrical tape. Use it for hand-sanding, or if you really have some smoothing to do, put the blade into the scrollsaw and use it as a power sander for tight places.
—Chris Lyles, Hereford, Texas