If a passenger suffers skin burns from hot engine coolant or flash fire, what is the correct initial burn first aid procedure?

1. Rinse or immerse the burned area with clean, cool running water (15–20°C) for 15 to 30 minutes, cover loosely with clean sterile gauze, and do NOT pop blisters or apply toothpastes/oils
2. Pop all burn blisters immediately with a sewing needle and apply soy sauce
3. Smear toothpaste, butter, and petroleum jelly thickly over the raw burn surface
4. Apply dry chemical fire extinguisher powder directly onto the raw skin