Over the last week I've been painting Meganobz and watching Agents of SHIELD and Arrow. It's pretty tedious with all the little magnetized bits to do as well.
I used Tin Bitz, which is now out of production but I have enough to use for a few more models.
Big Mek w/KFF
Big Mek w/Telyporta
I also went through and touched up my existing metal Meganobz, and then hit them with varnish.
Lastly, a comparison. Metal on the left, plastic on the right. The plastics are slightly bigger