John,
There's a product that you can get at any West Marine called Captain
Tolley's Creeping Crack Cure (no kidding) that's as thin as water, maybe
thinner and looks like skim milk when it comes out of the little squeeze
bottle. You might want to apply a bit of this on your logo to see if that
does the trick. When it air cures, it's clear with hardly a trace unless
you did it and are looking for it. Apparently this stuff follows the crack
and cures inside it, thereby sealing it from the inside out.
Good luck,
Glyn Judson
1969 Caravel #508