How do you get permanent marker off a diecast model bus?

You would be surprised. I was messing around with my diecast model buses and I discovered because at first I was using a wash cloth and water and it wasn't getting me anywhere so I thought to myself if I use a dry erase marker over the permanent marker it might work because when you have marker on a board and it wont come off, you scribble on it with a dry erase and then erase so I did that with my buses and it worked! try it out.