depends on what/who you want to turn him into. one of the tools i find good for kitbashing is milliput, which is a scuplting epoxy putty. its quite versatile and hardens up nicely!
Tekka wrote:What she doesn't realize is that Springer actually loves Rodimus.
I did a Hot Rod long ago, before there was the "Classics" line. If you're careful with a dremel you can shave the antenna/horns off and get a nice rounded look that works nice. (yeah, the paint sucks, especially the hood where I tried to do custom flames that kept mixing together )