Folksy Ltd

Does anyone have any experience with fixing glitter?

I’ve had a commission for a ceramic piece but the customer wants it covered in glitter.
It will be glazed underneath so that the colour can show through but this is a shiny glaze, so wouldn’t give the glitter anything to grip onto.
I was thinking of covering it in some kind of varnish to seal it but it is going to be worn as a pendant, so I need it to not be sticky at all.

Have any of you got any ideas please? x