Henna is an ultra fine light gold glitter that is intended to be used for the sugaring effect. This glitter can iron with or without top coat.
Magpie Glitter application tips:
Sugaring glitter
Sprinkle Yin onto an uncured layer of Don't Be Tacky or a Magpie Gel Paint. 
Cure the gel fully for 60-90 seconds in a LED lamp.
Brush off the excess with the Magpie Duster Brush. 
DO NOT TOP COAT.
10g of glitter