Once the paint is at room temperature, give it another good stir. Then paint the bath. Start with the top of the bath and work down. When the first coat is finished, give it 12 hours to cure before applying the second coat. Remember to give your paint an hour to come up to room temperature before you do coat number two. Once the second coat is finished, wait 24 hours before removing the masking tape and at least five days before using the bath.