you can paint it. Just scuff it up with scotch brite, and clean it real well. I would then sand off any paint where the sway-bar body bushings will ride.
also, dont lose the lube they sent with it. That stuff is for the U-clamp bushings, and is about the only stuff that doesnt squeek.
furthermore, did you read my article about shimming the u-clamp bolts to compensate for the added bar thickness?
Addco's new poly-bushings dont come with a "relief" molded into them. Therefore, the U-clamp now has to try to fit all that added thickness into the mount.
see here:
it's a diagram I drew up after I broke a U-clamp. I didnt shim it enough. You have to use 3-6 washers for the 1-1/4" addco rear bar. Trust me...if you dont, there will be a day when the clamp goes SNAP...and they arent available at Ford anymore.