I'm curious, what did you use to strip the original paint from the parademon models? I have had some difficulty with this in the past but your models look completely stripped and with no loss of detail!
Acetone will strip the paint off of them, as pure as possible (I use 99.5%) as I didn't find nail polish remover to be as good. You need to soak them for a short while, I try not to leave them more than 30 minutes or so at a time as it will soften up the plastic as well and make the figure rubbery, though they'll return to standard firmness after they're left for the acetone to evaporate. Then I just an old toothbrush to scrub the paint off under a running tap.
It's not foolproof though, avoid any hard plastic bits like the flying bases and stuff as they will just dissolve and sometimes it can damage the surface of the mini (such as Scarlet Witch there). I'm not sure why some minis (a minority) are damaged, maybe I left them too long but I can say don't do Groot as it pretty much destroyed mine as all the fine detail peeled off.
