Custom paint question

[Zachatello00]

Okay, full disclosure, this is not Turtles related, but it is custom action figure related. I recently picked up one of the Power Rangers Legacy Gold Ranger figures and used a really nice color of gold spray paint to cover over the shield that should have been painted gold already, but we won't go there...

Trouble is, while it looks very nice, the paint is still very sticky after several days, and when touched, if you're not careful, you can leave finger prints in it.

Any ideas on how to counter this? I thought about applying a coat of clear nail polish, but thought I'd ask my fellow Shellheads before trying that to see if there are other suggestions.