I magnetize all of my vehicles, and I intend to do my jet bikes as well at some point. Probably not the Hellions though. As good as the ball-socket stands are, I just find that every time I pick one up to move it, the base is slightly loose or gets knocked and falls out. Drives me nuts.
I replace the vertical post with a piece of plasticard tubing and glue a magnet on top of that. I will be painting the tubing eventually.