Workflow:
(first of all i modified the uv-s and modified the chest but only to add to it the interior, I know its forbidden to actualy modify that but i had extra space of texture left after I re-uved the chest so i just extruded the middle poly down, no extra detail was added to it.)
I first started with baking the ambient occlusion then added some wood texture that i found at cgtextures, added some metal texture over it and cuted the exact size for the iron bars, specular over that was painted by hand, added some minor detail like the rivets and minor canals in the metal.
Overall this took me around 90 mins only for the diffuse i spent an additional 25 mins for the specular and the displacement map thats used as bump map so that makes around 115 mins for all textures i think this will disqualify me from actually enter the competition but im just glad i finished this
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texture sheet
http://i47.servimg.com/u/f47/11/87/51/07/textur12.jpg