I can't see the difference in putting mica powder into the inhibition layer to putting glitter. They are both being placed over the top of cured gel. As will CND additives be.
I understand what you are saying and that's what I was thinking it's going on the nail not the skin isn't it. Shellac is hypoallergenic but you are still not meant to get it all over the skin are you.
On my leaflet it said not meant for use on skin but can be added to varnish for shimmering effects :?: hmmm