So this is a bit of lore, but the cracks are decorative and they are added to the armour as accolades (this is a tradition in his family specifically). It’s meant to show off hardships/overcome difficulties.
So Eggs is relatively new to his position so his armor is minorly cracked. The higher the position in rank the better the decoration, for example, the cracks can be inlaid with gold (which ends up looking a little like runny yolk). This was an idea that I was playing around with anyways.





















