I would use a sand or salt spray extinguisher. Just like oil or stove fire. Salt or sand works best. White powder.

A lot people don't know this but there's different extinguishers.

Class A: Wood, Paper, cloth, trash, plastics (solids that are not metals). Class B: Flammable Liquids-Gasoline, oil, grease, acetone (includes flammable gases). Class C: Electrical: Energized electrical equipment (anything that is plugged in).

Also more specific extinguishers.

Class A – fires caused by combustible materials including paper, fabric, wood and other flammable solids. Class B – fires caused by flammable liquids such as paint, turpentine or petrol among others. Class C – fires caused by flammable gases including methane, butane or hydrogen among others. Class D – fires caused by combustible metals including potassium, aluminium or magnesium among others. Class F – fires include those caused by cooking oils such as a chip-pan fire. Electrical Fires – fires involving electrical equipment but upon removal of the electrical item, the fire class is changed.