I had drybrushed my weapon boxes with metal too as it just gives a certain something. I hadn't thought of anything I liked for the Water and Food tokens though. I was just going to leave them bare, but now I'm re-thinking that choice.
My son was the creative force behind the design those. I did the work ( those food boxes were time really consuming). A friend had painted his trucks. I was determined to do something with the resources. I didn't even realize that the gun boxes had guns in them until I got started.