Tim McCreight's color workshop covered the range of traditional coloring techniques to non-traditional ones.
Experimentation was the word of the class, so experiment we did. Tim brought an assortment of coloring media and so did other class members.
The first piece was colored with Prismacolor pencils. Since the pencils need a "tooth" to hang onto, the metal clay piece was fired but not brushed or polished. Turpentine was used to blend the colors. Polishing was done by hand after adding the color. I've seen beautiful metal pieces done with colored pencil so I was a little disappointed when I tried this technique. But, the area I was coloring was small and I only had a few layers of pencil. Other classmates who had taken the Debra Weld workshop on adding color said they had "hundreds" of layers of pencil. (All said in a manner which indicated lots of hours.)
The second piece was colored with Liquid Sculpey to which liquid color (and sometimes powdered color) had been added. This was a fairly easy process but can be "peeled" right off the piece when dry. I did this in lieu of messing with resin, but I am going to try resin at my studio. (Resin was one of those many things I bought to try but never got around to.)