Depends. Are you just doing the "border" look similar to mine? If so, yeah, I'd go rough because it is more forgiving aesthetically when it comes to application. Rough is probably most popular, whether people have really thought about it or not, because as long as the border looks good the rest will be easy to look good. Just make sure the borders are prepped very well and you'd be good. As for washing mud off, a power washer has done great and as you can imagine, the rough destroys clothes and stuff so there isn't any other way to "scrub" it that I can think of.
As for rolling it, I can only speak on behalf of the rough, but I don't really see what the advantage of spraying would be. I've only heard of complaints, issues and problems when it comes to spraying. The only complaint when it comes to rolling is time. They both require very good surface prep and tape borders, maybe even bigger tape borders for spraying. Rolling is not hard at all. If you've ever rolled paint on a wall, you are qualified.
If you are planning on painting your entire ride, which is a look I'm not a fan off, I personally would then go smooth. Either way to me, if you are painting the whole thing looks tacky, but the rough all over the vehicle looks the most tacky in my opinion. I would imagine the smooth needs to look great because the imperfections would be super obvious so there would be way less forgiveness on mistakes.
Seriously, this was my first attempt at any sort of body work and it is not so forgiving because once it's on, it's on. And it turned out great. The biggest thing is prep and laying down a tape border that will look good. Once that is done, it is no different that coloring and staying inside the lines. The tape job is the art part, the paint job a monkey could do.
If there is anything I can do or you have any other questions, feel free.
I'm making up my mind whether to go the smooth or rough painting the outside of my 40. Seems like the rough is most popular, how is it for washing dirt and mud off ? I suppose a pressure washer is needed as a sponge or cloth wouldn't work with the rough surface. I read spraying the smooth didn't go well Danno, how does rolling it on work ? Thanks, Alex