This piece is very thick and is several layers of wool with various fabrics on top - love my sander :-) great texture that would have taken me hours to achieve just by rolling - it still needs some stitching and beads when there is more time.
My thoughts on this: I wondered "what if" I machine-needled wool through silk dupioni and then used the sander to felt it - turned out to be a great idea and one worth exploring further. I had painted some pieces with dye and color coordinated the wool with the colors on the silk - this would really be magnificent for crazy quilt squares; this piece still needs some more stitching by hand and some beads.
This is a different area of the same piece.
The photo just can't capture the areas with the soft subtle colors of this very soft and flowing piece - oh, and I also pulled threads from the edge and used them in the felting.
My cordless sander: I used two layers of rubber shelf lining under my piece to help cushion the vibrarion and when I kept the sander moving, the vibrations were manageable; still needed earplugs though. A good thing is that the charge doesn't last forever - maybe a good hour? so the temptation to overdo and do nerve damage is probaby helped by this since I worked for no longer than 10 minutes at a time. I purchased the battery charger that takes one hour to charge the 18 volt battery. Drawback is that the bottom of the sander is velcro so no way to attach anything to the plate to keep it catching from the wool; but that little point is very handy to get into small areas. Solution was to use heavy plastic over the top of the piece. I began using bubble wrap but a tiny area got a hole and it began "grabbing" the wool through the hole - scary moment - Yikes!
Bottom line is that I love it, expecially for those times when you want to speed up the nuno process. I just can't wait to use it again!