In the end I decided to just stamp them, gold heat emboss and colour with gansai tambi starry watercolours. It is hard to tell in the photo but each bauble is a different gold colour, in the light they simply sparkle.
I made the same card twice and have added both colour variations, I don't have a favourite but you might
Image: "crystal ornaments" Hero Arts
Colour: "starry" Gansai Tambi
Card: "cherry cobbler" Stampin Up and "pinefeathers" Papertrey Ink, gold is from my scrap box
Dies: Blueprints 27
Sentiment: "keep it simple - merry christmas" Papertrey Ink
Embossing Powder: "gold fine" Simon Says Stamp