I agree that the POR is "dull" looking compared to the factory paint. I also found it to be a bit more "olive" in color than the original. However, I'm not unhappy with it.
I'm not familiar with Hersh. However, for those who may be put off by the idea of having to spray it, I imagine it could be thinned a bit for spraying using a single-action air brush. I had to thin and spray the POR paint on the smooth metal parts (like valve covers) and the only caveat to share about that process is do NOT use the POR solvent to thin their engine enamels. Use mineral spirits and plan on applying several thin coats, then buffing the part if it needs to look really nice.