How to Refinish Leather Suede That Is Too Nappy
Brush away excess dirt away using gentle circular strokes with a suede brush or toothbrush. If the suede is wet, wring the moisture from the suede with a clean cotton towel, and let it dry completely before brushing the suede. If the suede is very dirty or has soiled areas, apply a suede degreaser before brushing.
Sand the suede with fine-grit sandpaper using circular strokes. The nap should rise, and some of the fibers should flake off. Wipe a clean cotton towel over the surface of the suede to remove the fibers and assess the condition of the nap. If necessary, continue sanding until you have removed a sufficient amount of the nap. Take care not to remove too much of the nap -- once it is gone, it leaves the suede more vulnerable to soiling.
Brush away any remaining nap fibers with a suede brush, being careful not to brush too vigorously. Wipe again with the cotton towel, or gently vacuum the remaining fibers with a vacuum attachment or a small handheld vacuum cleaner.
Spray a suede protectant on the suede after refinishing the nap to produce a barrier against soiling and staining. Reapply the protectant every six months, being sure to spray it in a well-ventilated area on dry suede.