To protect it from scratches? You could Rhinoline just that area. There are a few companies that make rocker guards as well, however if all you are wanting is scratch protection, go for the cheapest ones that go up high. I'm sure someone powdercoats theirs, otherwise your new rocker protection will just get scratched as well. The rock rails will keep your rocker panels from getting dented from below and may stick out enough to keep any rocks away on the sides, but they won't offer any side protection from scratches.

77 CJ-7 258 31" MTR's - now...
360, TF727, DANA 300, DANA 44's all sitting in the garage just waiting...