AskMeCha: mysterious orange, oily liquid in soda bottle in closet.→[More:]
My dad (with dementia, recall) apparently rubbed off most of the marker label, leaving the (first?) letters "F" and "W".

It does not seem to be floor wax.

It smells like an -ene or -ane flammable fluid, and my mom thinks it might be for the kerosene lamp.