Are confusing terms here....
Private labeling vs toll processing....
Private labeling involves using someone elses recipe and resources to manufacture a product. Yes you can have input for tweaking color, fragrance, and other things, but the more you change from the "standard offering" the more money it will cost, especially if the quanitities are not large.
Toll Processing is when you have your own formulation but don't have the means to manufacture so another company does this for you. Brewery's are a prime example.....the large american brewerys actually brew a lot of the microbrews that you see out there, but these are unique recipe's for a particular brand. All the manufacturer is doing is making the product so the customers specifications. Oh and it is typical even for manufactuers to purchase ingredients from other companys or suppliers. Relating this to the detailing industry......come on now, no one makes their own polymers....they are purchased from Chemical companys and added to a formulation.....
Developing a new product from scratch takes a lot of time and money. The easy way out is to just private label and one can have a dozen products under there belt very quickly if they are new to the game. If you noticed there are a lot of new players in the game recently.
As for Zaino, it was first developed back in the 80's and the only offering was the sealant. Yrs after the other products were developed one by one and added to the offering. T he last few new products added (Z8, ZFX,etc) were yrs in the making and testing. Rumors were out on ZFX over 2-3 yrs ago when a small group of testers were working with Sal to perfect the product. What makes me think that Zaino is a unique product, is because I have not found anything else that works the same...have you?