I had my frame abrasive blasted by local engineers, it came back very rough feeling, so I immediately etch primed it (2 coats) for fear of rusting, then had the frame powdercoated...I asked them to give the leading frame sections an extra blast as this is where most of the road rash will come from..
The finish I was after, was for a hammered metal style, which has a slight dimpled feel to it when completed.
This is how it turned out ( and I din't have to cut it back or polish it either)...and if I'm lucky it won't show up too much road grime between cleaning.