Back in the summer I had OPI's French Quarter For Your Thoughts, which is a medium warm toned gray creme. It was during the beginning stages of my shimmer obsession so I went searching for combos that could for the time being fill my need for ALL the Takko Lacquer polishes. I went digging through my stash and found a bottle of Enchanted Polish's "Secret Sauce".
"Secret Sauce" is a shimmer top coat that shifts from green to orange. I actually purchased this long, long ago when Enchanted Polish was first available on Llarowe and still pretty easy to purchase. The shimmer is quite strong and the orange is the more prominent of the two colors.
I didn't get a good enough photo with the green showing so I apologize for that.
Gray cremes are becoming easier to find nowadays, so if you can't find this particular shade of gray, then you'll be able to find another suitable replacement :) As for the shimmer, there are also other indie brands that make shimmer top coats like this, like Starlight Polish, and their color Phoenix.