Surface errors can be difficult to define, as the distinction between an error an a natural part of a material will always be based on a subjective judgement.
Your table consists of a frame made of powderlacquered metal and a top made of wood with either melamine or veneer on the surface.
Powderlacquered metal and melamine are not usually percepted as natural materials, and a reasonable homogeneity is easily obtained. That is why we ask you to send a digital photo of the surface error to product support. We will then contact you.
Veneer on the other hand is a natural material, and therefore one table will be different from another. These differencese are not errors - but a natural part of the trees in the forest. Your table top will also darken eventually by absorbing the rays from the sun. If you have an error, which cannot be regarded as natural, please send a digital photo of the surface error to product support. We will then contact you.