That texture is a mofo. I tried to get rid of it on the rear bumper pads and failed, even with 80 grit. When the shop did my valance, handles and mirrors, I'm pretty sure after the adhesion promoter (proper clean and sand beforehand of course), they laid down a couple coats of primer to cover up that nobbly plastic texture, otherwise it comes through the paint and clear.
An example, I color matched my license plate light housings, spare tire lock cylinder and the push button for the rear lift gate. I sanded lightly to rough it up, adhesion promoter, but did not use primer and you can see the texture through the blue top coat if you look closely enough. Not enough to put me off having done it as it is better than the black.
It is all going to boil down to the prep work put in. Shooting that top coat will pay off if you do the proper steps like mentioned above, otherwise you will see all your mistakes or shortcuts.
