I've considered going in and trying to clean these up with some putty but they kind of are what they are and I need to have the three we have started done by Sunday for a game so it's unlikely I'll do any more detail work.
I'll be painting these in my Hell Knights cammo pattern with markings. I'm hoping that will make them look a bit nicer. All in all though I'm pretty happy with the results especially since these are made from scrap cardboard and junk. They probably cost less than a dollar in materials.