To create a whiteboard-like coating for the posty notes you can either get them laminated or cover both sides with contact paper. I used some inexpensive contact paper that I found at the dollar store which could cover two and a half sheets of 8.5x11paper (whereas laminating an 8.5x11 sheet of paper would cost $2.50.)
To apply the contact paper cut two pieces large enough to cover the computer paper that you are using for your notes. Peel off the backing of the sheet and stick it to one side of the note paper. Start from the top edge and roll the backing down, use a ruler to smooth it out and prevent bubbles or creases. Repeat on the other side.