If we ever have an egg cracked that we really want a shot at hatching I use a white crayon and melt the tip and gentely rub across the crack.
so just about the same as beeswax.
im not gettin rid of this egg lol.
its 1 of 2 of my muscovy eggs that are veining.
i hope some of the pekin eggs start veining .
2 eggs doesnt sound like very good odds.