I like the layered "tiger stripe" effect, I think that can work as a nice distinguishing feature, especially if you vary the texture and/or colour as you suggest between the layers/pieces. And the blade looks good - is it a cyan or green?
Do watch your hands on the edges though... ;) did you sand off the sharpness at all? In case you didn't, I would imagine you could do this without affecting the finished look, and on the "stripey" pieces too...
Anyway, looking good and look forward to seeing more...