Wow, you really had no finish left. Finished job looks very nice. I did have about half the silver left, so I scuffed up with a red ScotchPad, then I did almost the same thing. I degreased with lacquer thinner, and added two coats of Dupli-Color Sandable Primer because of the scuffing. Then the Duplicolor Wheel Coat and three coats of clear.
How long did you let it dry between each of the four repeats? It's supposed to be ten minutes between each coat and all coats within an hour, or wait seven days for any additional coats beyond one hour. (I have my can in my hand). Or did you just mean you did 4 coats each one ten minutes apart?
I did 3 coats of Wheel Coating (Graphite in my case), one every ten minutes, then let it dry 30 min and then the clear(3 coats, 10 min. apart).