I didn't even need to paint or remove the glass for what I was going to do. This window was in perfect shape and even looked old.
I decided not to make it a chalk board but to make it a cork board. I had seen these sheets of designed cork at JoAnn's and I really wanted to use them. At the time I saw them I didn't have the window so I went back yesterday and picked them up. I also bought a roll of cork since the sheets of cork were very thin.
I then laid out the way I wanted the paper on the panes and got to cutting and gluing. I used the same adhesive spray glue, I used for the lego table. I sprayed the glue to the roll cork and on the glass, the cork above was self adhesive so I just peeled off the paper and stuck it down.
It was all very easy. The only thing I would recommend is maybe using more cork behind the decorative cork to make it thicker and hold the push pins in a little tighter but other then that it was easy fun and is going to look great in the mud room.