Material index

Identify each exposed part and its finish before cleaning or polishing. A method intended to brighten bare copper can also change an aged finish or affect adjacent plating and inlays. Treat the complete configuration as the reference, and use the maker’s instructions for those surfaces rather than one rule for the headline material. Copper finishes · Titanium finishes

Separate the original finish from later changes. Copper examples include deliberately aged finishes as well as maker-described changes from handling. Heat colouring, anodising, surface texture and patina are different descriptions; a photograph alone does not identify the cause of a colour change. Check the documented finish before trying to restore it. Finish and handling colour · Mokuti colour and pattern

If you have a known metal allergy, check the exact skin-contact alloy, coating and components before use. Nickel can trigger allergic contact dermatitis. Avoid your known trigger; ask a dermatologist if you suspect an allergy or have a recurring rash. A Wiki material name is not a product safety certification. American Academy of Dermatology: nickel allergy