Here is a question and no I'm not trolling. What does everyone do with their empty primer trays? I have given one to my sons art teacher but have not yet heard if he can use them for anything. With the cost cutting here in MI we call the teachers to see if they can use anything we throw out for projects. The art department in our middle school uses the Styrofoam trays that meat comes on after we wash them for their paint projects. Makes great paint pallets for mixing their colors and then thrown away. Primer trays on the other hand is a different story. Any thoughts?