Rust protection oil is used where protective measures such as alloying, plating and painting cannot be used. Most metallic parts and finished machines need to be protected from rust before further assembly and processing. For example,automotive parts can require protection ranging from a few days to a month. Fasteners, steel strips, steel sections drawn sections of steel, aluminium alloys and yellow metals also require protection. These oils are used where protective measures such as alloying, plating and painting cannot be used.