[Arran]

I think that realistically the only way to cover up those cracks is to stabilize the area by injecting glue, strip the finish, remove the grill bars (and the dial escutcheon if possible) and reveneer over top of the old. However the 42-327 isn't exactly a rare set, it would be far easier to get another example of the same model with a better cabinet then to fix the one you have, you may even find one with a better dial. I bought a replacement dial for mine from Radio Daze and then found out I could have bought an identical set to mine for under $20 over fleabay complete with a good dial. At least my set was complete other then that, but the speaker still needs reconing.
Best Regards
Arran