Kahuna Bay Tan Spray Tan Training Solution, 34 oz. Spray Tan Training Solution 0% DHA Provides clients with instant temporary color This solution is designed for new technicians who would like to practice on either clients or friends without risking poor lasting results. Our spray tan training solution has a natural bronze color guide and it will not last past their first shower. Kahuna Bay Training Solution is the best way to train with no risk until you are comfortable spraying with our regular solutions.