Salicylic acid cover-up discs protect warts as they heal. Clinically proven removal. For the fast and effective removal of common and plantar warts. Common warts can be easily recognized by rough cauliflower-like appearance of the surface. Plantar warts are found only on the bottom of the foot and recognized by tenderness and the interruption of the footprint pattern. Plantar warts grow inwards and are often flat due to the pressure caused by walking.