Keep the finish in the conversation
Ask for care instructions that match the confirmed finish and application.
Confirm what has been supplied
Keep the model and finish reference with your supply records. The finish descriptions in the catalogue identify appearance, but do not establish one universal coating process or cleaning specification.
If you are choosing hardware for a particular cleaning regime or environment, raise that requirement before the supply is agreed. A colour name alone does not confirm suitability for every condition.
Ask before using a treatment
Contact LONGLIN for the care guidance relevant to the supplied finish. Describe any cleaning product or treatment you intend to use, and avoid assuming that an abrasive, polish or chemical is appropriate simply because the product has a brass material description.
For a finish concern
Send the model, finish, supply reference and clear photographs. Describe when the change appeared and any contact with cleaners, moisture or other materials. This information helps the team review the concern without guessing from a colour name.