Remember, I finished the sketchbook I have been using for the Scavenger Hunts. Last night I decided to sketch in a sketchbook my friend, Sue, in Michigan, gave me a few years ago. I got out the Rotring pen I received for Christmas. The paper in the sketchbook is stiff and rough and I didn't think about that. It absorbed the ink and the pen wouldn't slide. Then I thought, well maybe pastel would be better so I would try the oil pastels that Jennie gave me a while back. Not good for that metal box either. You will not recognize the box. Whew!
Scavenger Hunt 118, on wetcanvas.com: Item number one - metal, this is a metal box for the Rotring pen. Really. I have no idea of time (the Hunt asks for time) but I know I struggled ... maybe half an hour. The box is gray brushed metal not blue wax. It is good to try a different medium and surface, right? It does make you think.

In order to see if I could do something with the OPs I decided to do an apple. Just from memory, so I couldn't use it in the Hunt, items have to be from life unless there is a challenge of some sort. Same sketchbook you can see the grid in the shadow. The apple is OK, but it was difficult to blend and additional color just sort of melted into the layer under it. I did use about 8 different reds, orange, yellow, purple and green. It doesn't look like it. More reading up on OP is in the works for me. I know you can blend them with turpentine and I think you can smush them around with tools. I just used the sticks themselves and my fingers. Messy! They feel like coloring with crayons and I was never very good at that. Ha.