Coffee is surprisingly good for external skin care. It is invigorating to the skin and helps with circulation, so it is good for the treatment or prevention of unwanted veins and circulatory problems. Sugar is good externally because it does not clog pores and it restores balance to the skin. If you want a finer grain sugar, you can pulse the coconut sugar in a spice grinder. Some people are more tolerant of a stronger exfoliator than others. If you have sensitive skin, definitely grind the sugar.