Include the anodizing specification
Do not describe a production finish only as black or clear. Provide the actual finish callout and any relevant supplier information. Color is one feature of the surface, not a complete process specification. Ask whether the proposed marking result changes the coating appearance or removes material in the marked area.
Use a production-equivalent sample
A sample from a different anodizing batch may be useful for a preliminary discussion, but it should not silently become the final acceptance reference. Record where the accepted sample came from and which part revision it represents. Review the mark edges, contrast and location under the same conditions used for receiving inspection.
Manage cosmetic expectations
For visible housings and panels, define whether small variations are acceptable and who approves them. If multiple parts sit beside each other in an assembly, consider evaluating them together. Keep the approved artwork and orientation consistent across orders. When the anodizing color, supplier or process changes, notify the marking supplier before releasing the next lot.