I spent 5 hours a few evenings ago applying Con-Tact clear to EVERYTHING that could possibly see wear and tear. The top of the movement dials, the bottom and speed/direction side half of the dials, the movement templates, the range ruler… everything. It's *all* protected now! It took some time, but in the long run it oughtta be **well** worth it.
My technique was to put the piece of Con-Tact sheet on a hobby cutting board, sticky-side up. Then plop whatever side of the dial half, template etc. you want protected firmly down on it. Then CAREFULLY using an Exacto knife around the edges of the piece and then removing the excess. Rinse and repeat for the other side of the piece. Don't forget to cut out the hole of the dial pieces! Then just assemble the dials as usual. I did it again yesterday with newly bought X-wing and Y-wing and by then I'd gotten really fast at it :-)
I just did mine today, thanks to this thread. I was happy to find the exact same Con-Tact sheet at my closest local hardware store. I only protected the side of the dials with the movements printed on them, but seeing TK's pic, I guess I have to resign myself to protect the outer faces of the dials as well, yeeoch!