You'll get a 250ml sample of our solution so you can test it on your client's. 250ml should get you 3 or 4 spray tans (average) Our solution is an express solution so please follow the timings below: 1.5 hours for a light tan 2.5 hours for a medium tan 3.5 hours for a dark tan Overnight for ultra dark We always double layer with our solution for perfect results every time! Do the first layer with precision and care and move a little slower and use around 60% of the solution, then for the second layer, spray faster to ensure a flawless coverage. We'll send you further instructions on how to use our solution when we've processed your order.