I saw on cable on demand a demo video by WheelsNThangs, I think where he totally refurbished an old Hot Wheels car including paint stripping, electrolysis to reapply metal to the casting. His youtube is a good place to start, where I think he lists his tools used. I also saw these youtubers say they accidentally drilled their hand. This is why I haven't drilled yet. I don't have a proper setup with rubber pieces and a clamp. I do have an automatic center punch which is vital for drilling into metal. I also don't really want to mess with the toxic paint stripping chemicals. I recently started messing around with Lego train tracks and the plastic small wheels tend to drag on the track, but the bigger wheels with some sort of rubbery o-ring roll nicely.