Do you remember Floss Gloss? I don't remember how I heard about them but I bought one single bottle - Dimepiece. This is a holographic glitter in a clear base but it's densely packed.
I started with Morgan Taylor REACTmax in Original, 2 coats of polish, and finished with ILNP Glass Candy. The polish was a little goopy but not unmanageable.
You can still see some bare nail here but overall it's pretty well in coverage in just 2 coats.
Floss Gloss has closed and is no longer available for sale.