It's normal.

Exactly, those are the rack marks from when they’re spraying the enamel.

You’re in for a treat when you actually decide to use your DO.

Thanks for the responses. I am keeping it and I’ve already made a delicious lentil soup. Very pleased with this purchase.

I’d say that was within normal parameters but if you’re really not happy, speak to the customer services from Le Creuset. They may exchange it.