Bumper turned out sparkly and uneven?

[u/Xerox0987]

I used three coats of primer, three coats of orient blue metallic (the color on my car) and then three coats of clear coat. My bumper turned out sparkling while my car isn't, why is this and can i fix it? My bumper has darker spots but that's because I put an uneven amount of paint on.

The bumper is made out of ABS Plastic.

Any insights are very much appreciated!