Josh, you really don't need to use a separate sealer on a floor unless you are doing a really old worn floor, or terrazzo, slate, etc. The majority of the finishes on the market today have a built in sealer. As for using an airmover, it works well but you have to do it right. You can't put an airmover shooting directly across a freshly finished floor or it can make "waves" in the finish. We usually wait until it levels and just starts to dry. Using the airmover at this point can easily cut drying time by 10 or 15 minutes per coat, or more. Just don't forget to give it a few minutes of curing time after its dry to the touch, and that varies from finish to finish.