How to:
1. remove glass
2. seal flaky paint with stain
3. To make the chalk board I used hardboard. Hardboard is smooth on one side and rough on the other. It is fairly thin. I used a jigsaw to cut it to size, the edges are hidden and I don't have a table saw.
4. I used spray chalk board paint in a can, I also primed the hardboard with spray primer.
5. I placed the chalkboard in the window frame then ran a bead of hot glue behind chalk board to secure in place.
6. add vinyl
Sorry I don't have better pics, computer issues.