Repainting interior woodwork calls for careful planning and the right materials. The first step in any good paint job is preparation of the surface. Sanding trim work can be tricky. To save time, use a sanding sponge available at any home center or a detail sander to help you prepare the unique contours of your woodwork. Or, consider one of the new environmentally friendly paint strippers to provide the optimum surface for repainting interior woodwork..