Metal Tooling & Window Markers

Let me be honest, I haven't done metal tooling since I was in college.  Mainly because of the expense of the metal itself and the expense of permanent markers to add color to the metal.   But guess what I discovered?  Crayola makes window markers that come in 8 fabulous colors and these not only work on windows, but they also work on metal (or any slick surface that would not normally accept water-based art supplies).  Ta-Da!!!