Centerboard crack and bailer issue

Another issue popped up with the "new" boat. I turned it on its side to inspect the bottom of the hull and check out the centerboard today. The centerboard itself needs some love, but that can wait until after the season. When I looked into the compartment, I noticed what looks like a thin crack at the very top of the centerboard slot.
I could barely see the crack, so I am thinking that it is a project that I could put off until I fix up the centerboard after the season (am I correct in that regard?). As this is a hard spot to work on, would brushing some epoxy on it with a super long handle brush work?
Also while the boat was on its side, I noticed a poor maintenance job from the previous owner on the auto bailer for the bilge.
The stuff looks and feels like silicone bathroom caulking. I already purchased some 3M 5200 to fix the same caulking issue under the transom lip but it sounds like that would be a poor choice on this part, as it should be replaceable. Any suggestions on a product to reseal this after I remove all of that silicone garbage?
Tony
1976 Daysailer II #9010
I could barely see the crack, so I am thinking that it is a project that I could put off until I fix up the centerboard after the season (am I correct in that regard?). As this is a hard spot to work on, would brushing some epoxy on it with a super long handle brush work?
Also while the boat was on its side, I noticed a poor maintenance job from the previous owner on the auto bailer for the bilge.
The stuff looks and feels like silicone bathroom caulking. I already purchased some 3M 5200 to fix the same caulking issue under the transom lip but it sounds like that would be a poor choice on this part, as it should be replaceable. Any suggestions on a product to reseal this after I remove all of that silicone garbage?
Tony
1976 Daysailer II #9010