I've been interested in this technique for a while-- another of those things I just hadn't gotten around to trying. If you're one of the other two or three claying people out there who haven't given this a try, yet-- ;o) -- you should really go for it! It was fun and so easy, assuming you have a decent clay extruder. Speaking of which. . .
For a while, I was put off the idea of extruding by the fact that it hurts to push clay through one of the old syringe-style extruders. Then my husband made a bellows-type press for my extruder (using a hinge and two scraps of lumber with strategically placed holes), which worked very well. However, I must've put too much pressure on the poor thing, because one day I noticed that the part that presses the clay through the tube had bent, rendering the whole thing useless.
Fortunately, my Christmas wishlist entry of a new clay extruder (this one by Makin's Clay) didn't go unheeded. ;o) I've only used it a few times so far, but I'm very impressed and can't reccommend it enough. It's much easier to operate than my old one was.
I'm looking forward to using this technique again, soon. So many color combinations to try!
ETA: Of course, you can also make a retro cane without any extruder at all, just by combining several different bull's-eye canes worked in coordinating colors. It's a lot more work than the extruder method, but it's certainly possible.
