Honest question here. We were parked next to an Allegiant MD-80 today, and we saw the CA (not the FO) come out and do the walkaround. Except he had a folding ladder and a long white pole, and he climbed up on the ladder and was doing something to the upper surface of the right wing with the pole.

For the life of us, we couldn't figure out what preflight procedure could require a ladder and a pole?