I bought a Trap about 2 months ago and I still don't know what to make of it. I wouldn't go as far as to call it one of Hammer's worst releases, however I did need to make a lot of adjustments with this ball. OOB it hooked way too much, I couldn't even keep it on the lane so I had to polish it. For the first 3 weeks I hated this ball and it didn't help that my pro shop had to drill a weight crater to take off what looked like a pound of top weight just to make it legal. But.....after practicing with the ball I have improved my game because of the adjustments I had to make, and after making adjustments I started to improve my approach. Yes, it's sometimes unpredictable and despite what my pro shop told me if I use it on dry lanes it will practically make a u turn but I have shot my highest series and game in league with it, and have maintained a 200+ average from a 163. But to answer your question if OOB it's sanded I would polish it and be prepared to make some adjustments and don't get too discouraged if it doesn't carry the way you want it at first. I do agree with the consensus though, unless you are getting a pretty good deal on the ball (it's either retired or getting ready to retire) I would look into some of the new releases from Hammer, the Arson looks pretty decent and not priced too high.
"Bowling is like sex...it's only fun if you're doing it"