That said given that anti corrosion paints commonly contain Iron Oxide and
Aluminium (though not necessarily mixed), it's possible Thermite like
reactions could have taken place spontaneously, obviously aeroplanes are
made of aluminium and steel frame buildings contain plenty of iron oxide in
any case since steel rusts. So clearly there were plenty of things to react
together e.g molten aluminium making contact with rust coated steel should I
would think cause a reaction.

booohoooo....i am getting soooo tired.....neantherthals had more brains...