Hi Adam,
There is going to be two issues with these cracks, one will be trying to hide them under colour. the second is that one of the craks is perilously close to the neck pocket with the wood grain trailing towards the pocket. I do feel that it is likely that that section of the body will eventually fail. It is also likley that the cracks will reopen. I had sealed the body with shellac, before I went off on my holiday to Singapore, but that was only a few sprayed on coats. I have no problem with doing a full reset and swapping this for a new kit.
Cheers PK