Yes, I use FIMO, mostly because it is easy to obtain around here. I have one shop nearby that sells Sculpey and I didn't like it, hard and crumbly- I suspect there isn't much turnaround and their stock is old. I've ended up blending custom colors at times- like your food processor idea. Bold! How do you clean it? I sometimes work in epoxy clay, and lately I have had access to a professional oven, which means I get to do old fashioned ceramic clay, which is proving a little bit frustrating so far, because it has limitations synthetic clays do not have. I like the way in which you lay out these plaques- it is like doing a drawing in 3d.