Varnish paint would also be good, right? I haven't risked using some in my custom Hex, but even after two months she's still kinda sticky if I hold her for too long. Might be because I didn't mix the paints with water properly but can't be sure until I customize another figure.
Varnish paint is best used on wood...not plastic...or this type of soft pvc that the figures are made of. "Kinda sticky if you hold her to long"? What kind of Acrylic paint did you use? And by the way Bifrost i like your Pretty In Pink Hex...she looks realy cool.
I recommend getting Model Master Acryl Clears (Gloss, Semi-Gloss, flat)
I used the Model Master Semi-Gloss Clear on my Sequoia Tree Rex because i didn't like the glossy look of the clear red. And i just put it on the Red wood parts nothing else.