Rub down with wet and dry. until your happy. wash with clean water and dry. While you are doing this place the primer aerosol can about 8 inches from a hairdryer to warm the paint. shake well . then warm the cowl up with the hairdryer . then spray a very light mist coat on , the dry, keep doing this until fully covered, then give it a light sand with wet and dry. wash again , dry then give it a good coat of primer. let it dry over night, Rub down , wash , dry, then paint,