I used FIXIT Sculpt, but there are probably lots of different putties that'd do the job. The same sight offers a product called Apoxie Sculpt, which is just about as good at a cheaper price. FIXIT Sculpt
Although I really love and appreciate the slight redesign you did To that Supernova Avatar, the Original Avatar was made by Maximus Prime and it would be great if you not only credited him for the original Avatar (which was created from my Art over on DeviantART) but also asked his permission to alter his Avatar before posting it as your own.
YouTube - Transformers Animated - Predacons Rising - part one First part of the episode, you can find the second from there.
Yeah I've seen the latest episode, was pretty good I like the beastwars animal cameo at the end. Wondering if they transwarped to the BEastwars universe or just to the jungle.