First off I don't scrape after waxing. When I get home from riding I bring my board in the house and let it warm up. The next time I go riding I wipe off any road grime from the ride home. Turn on the Iron and spread whatever wax is left on the board and warm the board up once you feel the heat on the top sheet your ready to add wax then spot wax whereever needs it usually the edges. I use all temp wax so no need to check snow conditions. Then go ride.
You take an Iron to a dry board?