We understand that you are worried about hairline cracks in the kamado's ceramic, and that this comes across as a cosmetic imperfection, or even a manufacturing defect.
This is craquelure. Your kamado is made of natural material. Craquelure is a characteristic of ceramic glazed products. After the baking process of the glazed ceramic during production, very minimal residual moisture may remain. Sometimes the hairline cracks look remarkably white. That is the ceramic dust being pushed out by the moisture. When heated, this can increase. This is not harmful to the ceramic and does not affect the operation of the kamado.
Solution:
You can treat the kamado with a polish, for example this. one. Once you have done this a few times, you will see that the white effect diminishes or even goes away. Moreover, you can use this to protect and clean your kamado - 2 birds with one stone! The polish is colourless and can therefore be used for different colours of ceramics.
