I would go with at least semi-gloss if not gloss, depending on the paint. Mine is semi-gloss Rustoleum and looks the closest to the area I cleaned up on the wheel before I painted it. Definitely not flat, and most the Satin paints seem too flat to me also. Spray cans kind of limit you to the 4 types of paints: flat, satin, semi-gloss and gloss. If you are shooting with mixed paint/spray gun you can do 70, 80, 90% gloss to get closer to original. I think the wheels tend to loose some of their shine over time due to dirt, scratches, etc. I found a spot on the wheel and cleaned/polished it really well so I could compare.