I have two Cadillac products: Cadillac Care (conditioner) and Cadillac Shield Spray (protector). I don't have one that's a cleaner. So I thought (after I do a test on the bottom of the bag first, of course!) I'd do Cadillac Care, let it dry overnight, and then the next day spray it with Shield Spray so I don't have to worry during the rainy season.
And maybe I'll use For Handles Only on the handle, since I do sometimes grab it by the handle and I'd hate for that to get all grubby.
Please share your results once you're done! That sounds like a great way to protect the leather!
ETA: is the spray also at Nordies?