Folks always said the tinfoil helped eavenly heat - I figure thats up their with the proper design for the tin foil helmets to protect from the first contact - knowledge we all need pass to our children.
Pops would cook lunch on engine manifold while workn then serve up lunch. Seenm make broke of trim into hash in engine compartment but was very young and never figured how. I'll have to ask him if he remembers.