hammer finish whole heep

I have two coats of rustoleum hammer paint on the heep right now, it turned out pretty cool. The problem is my roller nap is sticking in the paint. What type of roller do I need? Something for chemical applications, it has xylene or something like that in it? Planning on another coat so no big deal, but it would look really good with the right roller. Thanks, Buz

Black "polyurithane" ones??

Thanks I'll give that a try and post up pics when I'm done. -Buz