What should you do with oily rags after completing a workshop task involving oil-based finishes or lubricants?

SPONTANEOUS COMBUSTION is a real fire hazard with oily rags, especially those soaked in linseed oil, tung oil, or similar drying oils. The oxidation of these oils generates heat — in a bunched pile, that heat cannot dissipate and can reach the ignition point of the cloth. Safe disposal: spread rags flat outdoors to dry completely, OR place in a sealed metal container with water, OR use a metal safety can with a self-closing lid. Regular trash bins and indoor piles are fire hazards.