Something to consider, By using the right blades and techniques, you shouldn't have to sand an inside cut or even an outside cut. Practice cutting your lines accurately. If you stray off the line, make a gradual return to the line rather than an abrupt return to the line which will have to be sanded out. If I make a misscut, I go back and touch it up with the right side of the blade. The right side of most blades have a burr from the manufacturing process.
The only sanding I do on cuts is with a folded piece of 220 grit sandpaper to clean up any fuzzies on the back.
The smaller the blade, the smoother the cut will be. For that reason, I use the smallest blade that will do the cut.
I always sand the blank to final grit, Usually 220, before I start cutting, that way I only have to touch up with the 220 grit sandpaper.
My goal is to eliminate as much sanding as possible!