Had powdercoat on my old rig, got paint on my new one. Even if you dont slide around rocks on em, they get chipped from rocks and crap in the road. My advise, you can touch up paint, but cant reeeally touch up powdercoat without it looking like crap. A good paint job looks just as good as powdercoat.Take your time, get a 6 pack of PBR and wipe the sliders down with acetone, scuff em with scotch brite, wipe again, prime with some self etching primer (I like the rustoleum stuff), then spray with some paint, I would recommend some sort of textured paint as opposed to simply satin, matte, or gloss paint. Budd will recommend the same.
I talked to Bud about this same thing when I got mine from him. Plus, you save enough money by painting em yourself to buy a lifetime supply of paint. :hatsoff:
I used Rustoleum's spray on truck bed liner. Worked excellent, still looks great 6 months later, touched em up one time after a long off road trip.
My 2 Cents.