Aaliyah--make sure you ask whether or not the waterproofing done at the spa will change the appearance of the bag. I have heard it can make it look shiny or glazed.
I believe Colonil makes a gel you can use to waterproof yo9ur bag, and so does a company called DRYO.
Colonnil leather gel left patches on one of my smooth leather luggages (Tricolor one from F/W 2011), you should definitely test out a small hidden area first! But saying that, Colonnil spray worked okay on that same bag. The gel worked wonderfully on my drummed leather luggage though.