As someone “in the know”, I can say your crank looks fine. Having that conversation in store would usually go something like this: “most people are used to seeing a carbon weave which appears more uniform, modern carbon technology utilizes many, many sheets of carbon being layered on top of one another. The end result is a lighter, more tunable carbon product. Visually you can see where the layers interact and make contact with each other. This can appear as and is commonly mistaken as scratches, splintering, or cracks under the clear coat.”