Stain/Paint all four sides of spindles at once. Drive in screws and keep fingers clean. Finishing spindles is a pain because you have to finish three sides, let them dry and then turn them over and do the unfinished side. But not if you drive long drywall screws into the spindle ends and then rest the screws on two boards or sawhorses. An added bonus is that you can keep your fingers out of the wet finish by holding onto the screws as you stain or paint and turn.