Looking for an interior opinions or pros, and cons.

Had mine bead blasted and primed. Recently, I bought some gloss black from Home Depot, but got some runs. I wet sanded and repainted which made it worse, now I have a run on the top part which meets the windshield. So far, it looks horrible due to my lack of experience and I will sand again. Meanwhile, I have a can of Chrysler flat black staring at me that was bought at a show.
I was so mad and as a punishment, I went out an bought a 21 gal. compressor for myself!