I have the 1624 and often use reverse for sanding and finishing as Sawdustfactory mentioned. It really does not seem to help me with the actual finishing however, it does sling the dust (or finish if you put on too much) away from you. You can bring your dust hood up close behind and capture at lot more, or at least it seems so since I can see the dust being taken away.
They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety. Benjamin Franklin