Most builds are done with a 1/2" recess for facing panels. Meaning all body panels like the CP, kick plate, marquee, are 1/2" from flush with the side panels. Then you can do a 1/2" radius it on them with a jigsaw.
As yours is mostly flush, or much less recessed I'd just hit it with some sand paper or a sure form rasp and call it good. The build looks ok, just knock a few of the edges down a bit.