The plugs are 8mm double-flared clear acrylic, though I did have to sand the back flares down a bit as they were mahoosive. Once they were sanded to size, the rears were given three coats of Orly - Meet Me Under The Mistletoe then a top-coat of black to give the glitter a bit more oomph. The sanded-down bits were treated to a quick coat of clear nail polish to smoothen then up, as they tend to not go in otherwise.
Quite pleased with how they turned out, actually, and I'm not the biggest fan of the colour green (though I wouldn't say no to a pair of these galaxies in 0g). Going to try out some duochromes later this week, they'll hopefully look pretty badass.
Late edit: If you want to remove the polish use an acetone-free nail polish remover otherwise it will make your acrylic plugs go cloudy and :( Also, some polishes may discolour the acrylic, so you could be best off with some bog-standard glass plugs instead.
