I am not much of a BB gun guy. The terms 'BB' and 'accuracy' normally do not belong in the same sentance. The only BB gun I have is the Crosman 454 BBMatic; sold all the others.
The Daisy 1200 is just plain fun to shoot. So, yes, it is a good candidate for a reseal.
The Crosman 454 is also a fun shooter and easy to work on. You can shoot an aluminum tin can in half in 15 minutes or so at 5M. A reseal kit likely will cost what the gun is worth. I have one and only use it to when I wish to fair poorly in CAPOF monthly BB target competitions.