i might sugest you take a look at the works of the native americans. they fire
in a very similar fashion to a bonfire using dried animal dung. they take the
works pile them up and put metal sheets on them and wood insidethen cover with
the dung and otehr stuff. the artist to look up would be maria martinez i
believe. her word she used black slip and burnished areas. its quite famous.
and similar to your idea since she had to gatehr the materials herself
"Democracy is two wolves and a lamb voting on what to have for
lunch. Liberty is a well-armed lamb contesting the vote."

-- Benjamin Franklin, 1759