Yep, got mine a couple weeks ago...same sanding scuffs which look like clean up after injection mold casting. The feel is definitely different..not sure if thats a bad thing or not yet as I too have not thrown it so far.
What it looks like to me, being in construction, is HDPE ...some type of polymere or copolymere..??... that they make weld seam water pipe out of...feels and looks exactly the same. I just put it on the wall with a couple other ones I have there. You've all got me curious now, gonna have to take it out this weekend and throw it...see what that sucka does in the air.
Might be a bust...might be the best thing since sliced bread....never gonna know until ya let'er fly though. If it doesn't fly right, I'll report back...if it does, ya may not hear from me...I'll probably be out on the course with my new secret weapon!