Scrape off any rust with a scrubbing pad as soon as it appears. Untreated rust spreads, causing more damage.
Dry the chrome with a paper towel if it becomes wet. Dry chrome is less likely to rust.
Keep the chrome in a cool and dark place if possible. Also keep the chrome out of direct sunlight because heat increases the likelihood of rust formation. Avoid humid or damp places like bathrooms, kitchens, garages and attics, if possible.
Apply a rust-inhibiting primer to the chrome with a paint brush. These primers provide a coating on the chrome that prevents rust formation.