DTM paint wins for me. I'll be honest, I've never rolled it, but the stuff sprays great out of a HPLV gun with some slight thinning. It says it can be rolled so I can't imagine rolling being too much of an issue.
Why I like it? Doesn't really smell too much. It's acrylic but has an enamel like quality. It's reasonably priced. Sticks great to a ton of different stuff. Vinyl sticks great to it. It's also something you can buy at Sherwin Williams or from a PPG dealer which is great compared to some of the special buy paints out there.
Prep is to rough up the surface with a high grit paper. Clean it off well with alcohol. Then paint. DTM has really great adhesion qualities so you should be good to go. Just don't rush the paint. If it says it needs 4-6 hours to dry before re-coat, wait 6 hours. If it says 24 hours until cured. Wait 36+ hours. It's worth it to be a little extra cautious.