Advice for G1 Repaints - SG Computron & Abominus

So I've never done any customizing beyond simple part-swapping and cannibalization, but ever since images were released I've been dying to get a second set of Computron and Abominus to repaint into their SG selves.
I've been reading about enamel paints and there's a few hobby shops around me, but I was wondering if you guys have any suggestions on prep work, styles/techniques or even paints/colours specific to the G1 plastics, joints and other workings. It may be my first, but I still want to make sure it's done right :3 Thanks!!
I've been reading about enamel paints and there's a few hobby shops around me, but I was wondering if you guys have any suggestions on prep work, styles/techniques or even paints/colours specific to the G1 plastics, joints and other workings. It may be my first, but I still want to make sure it's done right :3 Thanks!!