shinoda slot cars 

https://www.roadandtrack.com/car-culture/a29773712/larry-shinoda-slot-car-racing/?fbclid=IwAR1lAlg4CdNwXLMr7epPHU6YQoaKzxBU_hPQ5DSrEZo2GOhV54LJBEZ65jA

I remember some company sold clear slot car bodies that were meant to be painted on the inside by the hobbyist for a super gloss finish

I remember that clear body  too steve. Metal flake purple was a personal favorite.