Auto Finesse Aqua Coat comes pre-diluted to the correct strength for safe exterior use, and should be applied to cool, clean, wet surfaces at the end of your usual hand washing process. For best results, lightly mist Auto Finesse Aqua Coat on to small sections at a time (it's safe for use on all exterior surfaces) and then spread it as thinly and evenly as possible using a fresh wash mitt. After spreading it, allow it to dwell for a maximum of 1-2 minutes before rinsing it off thoroughly (the use of a pressure washer is recommended). Once all sections are treated rinse one final time (to ensure that every last trace of residue is fully removed) and then towel the car dry, or else rinse it again with filtered water if you intend to leave it to dry naturally. As an approximate guide, you should be able to treat an average-sized car using just 75 ml of product; a little goes a very long way when you apply it using the mitt method described above. Finally, note that you should never apply Auto Finesse Aqua Coat in direct sunlight or allow it to dry out before rinsing it off.