that tire softening snake oil crap in a can is nothing to worry about. We tried all kinds of tricks in the miata days and none of it makes u any faster. It works for drag racing but not on a road race tire. It actually made a friend of mines tires more slippery plus it wears off in a couple laps (which was a good thing). Not worth worrying about. And there is no way to police that anyway. Unless u buy tires off the truck like you were saying and you pay a small fortune to have them do it all for you.
“A man with no enemies is a man with no character.” 
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