Here's how I apply nail foil over my Color Street mani! However, the process would be no different if you were applying over regular liquid nail polish - you would just use liquid topcoat instead of Clear as Day (Color Street's clear overlay).

Nail Foil Kit:
https://www.amazon.com/gp/product/B07...

Colors: Greeking Out and Caribbean Coral

A Polished Life
https://linktr.ee/lisatom​
(First box to shop Color Street website)