Yeah, on top of your dailies/weekly hunt you can just keep hunting the A and S ranks for each area (they respawn like every hour or something). A girl in my FC has made a point to records times and places for a lot of the A and S ranks and she's already un-weathered her entire left side of gear just from those alone.

Pretty effective if you spend a few days doing nothing but hunts and, say, FATE grinding for atma at the same time.