This car-care product manufacturer and who-makes-what-for-whom "debate" has been in this forum for a very long time. I would think that their a several car-care chemical product contractors who will make almost anything for anybody (for a price). Northern Labs in Manitowoc WI (makers of J-Wax and Kit Car Wax) is one such contract facility, as is R Lewis Technologies in DePere, WI.
.
Turtle Wax got rid of their product manufacturing facilities in Chicago IL and now contracts out that part of their business .
And doesn`t Warner Chemicals make Chemical Guys Products and some of Adam`s products, supposedly? (Ah, THE Great Debate, or more correctly, the Great Speculation.)
And wasn`t S100 Motorcycle care chemicals "the same" as P21S?
And then there is the Menzerna-Jescar similarities, although Jescar adamantly states they are different and from what I have read of their products reviewed in this forum, that appears to be true.
Then there is the acquisition of 3M`s Car Chemical Division bought by Meguiars. Good synergies?
Need I say more??