I've used Zaino products for about 5 years and have been very happy. I need to place an order and detail both of my cars once I get it. I've used multiple coats of Z-2 and/or Z-5 in the past. I see that they now have an AIO product. When would it be advisable to use this prior to the Z-5 (or Z-2)? Both of these cars are used every day - one is outside at night, one in the garage. Thanks