Oxidation and corrosion: act early without erasing the surface

Light surface oxidation is different from active corrosion, pitting or material that is flaking away.

Periodically inspect metal parts, screws, bridges, tuners, chassis and connectors. If deterioration is progressing, identify the cause first: humidity, perspiration, contaminants, leaks or unsuitable storage.

On vintage gear or original finishes, aggressive cleaning can remove plating, markings or historical patina. When uncertain, document the condition and consider specialist work.