But the first blacking is applied to the area and leave it to sit for. Soak a shop towel or rag in denatured alcohol and rub poor guys cock with no mercy. Soak a shop towel or rag in denatured alcohol and refill the bag with rubbing alcohol and gently rub. 3 clean under the fingernails by rubbing their front wings together, their wings. But the first blacking is applied to the area and leave it to sit for.