I use SEM trim black, I have tried a lot of other cheaper stuff and I just keep coming back to SEM. That is what we use at our body shop for stuff like that, I have it on my car around the headlight buckets where there was some old rock chips it works the best, plus the self etching stuff just saves you that much more, and it sprays with a smoother texture then other stuff. The only stuff I haven't tried is the trim black from Napa it is a Marten Senior product and is suppose to be nice.