If you use one, always have a fire extinguisher within easy reach.
Always have a fire extinguisher handy during any engine start.
Something we find useful in the North country, especially for automobile doors, is WD 40 spray. We open the doors and spray it on the latch and inside door jam. This prevents doors from sticking/freezing.
Dry lube silicon spray does the same thing. It doesn't attract dust or leave residue that can attractdust or dirt.