Good tip!

I've been reading up on using everyday objects for sharpening. If you've ever watched the Ray Mears video on knife sharpening he uses Japanese water stones but then 'steels' the edge using the edge of a car window.

"...If you've ever watched the Ray Mears video..."

Nope, sorry. When you are on a slower than dial-up connection, you don't get to watch videos. I have used the edge of glass trick tho, it works...