I have a couple Kangaroo cabs of the same type. The paint just doens't want to come off. There hasn't been any amount of chemicals or force that I've been able to apply that seems to damage the artwork, though. That stuff will come off sooner or later. It's just gonna be alot of work.
I did beat it up when I was removing the laminate, though. (By the way, this thing had 2 thick layers of paint and the topped off with laminate.) When using the heat gun, I bubbled small portions of the sideart underneath. Oh well, live and learn, right?