I wish I knew this too cause I still have crystal coat unopened but I didnt realize how difficult it was to use. Here I thought it was easier to apply so I made the expensive purchase.
Not happy at all about it.
Id say marketing hype to make you buy more product. Unless someone says it contains some sort of primer/bonding specifically made for that exact coating you can probably mix and match.
Of course if it fails they will blame the prep anyway.