Today's AWAD is:

encaustic (en-KO-stik) adjective

A method of painting using pigments with wax fixed onto the surface by heat.

noun
A work of art produced by this process.

[From Latin encausticus, from Greek enkaustikos, from enkaiein (to burn in), from en- + (kaiein) to burn. Some distant cousins of this word are caustic, calm, and holocaust.]

Examples of encaustic [per Anu]: http://www.encaustic.com/photopost/

It should come as a surprise to no-one that art you can make waxing hot air is "encaustic".