Flamable vapors, both heavier than air that lie on the floor as well as
mists from areosols are high on my list. Even wiping off a part with
laquer thinner leads to a solvent soaked rag that I try to get outside
or into the fire.

Second biggy on my list is welding sparks that hide in the dust bunnies
under the bench, light up hours later.

SteveF wrote:
In the thread on the shop carpet the issue of fire from coolant mist on the
walls got me wondering. Being one of the hobby guys in a wood framed
garage, what other not obvious sources of fire have some of you seen?

Steve.