307 Plastic Parts Painting

Hello friends. I researched a lot of previous issues but could not find the answer to my question. My vehicle 2003 1.6 xt. The black bands on the bumpers and doors are not on the color of my vehicle. I want to paint them in bright black because they are black. the color of the vehicle is blue. Do you think it makes sense, that they apply shine after every wash that will be bright black. I had thrown the ashtray in the car sometime. I painted it. The pine control buttons on the door handles were very scratched. I took it out and I saw that the scratches were not scratches of the plastic, but the varnish layer covered on it. I sit and scratched them all patiently. then I sprayed a few. it was just fine. How do I need your ideas if I paint the plastics I mentioned on the outer side in black now?

First fine fine sanding, then spray primer will be discarded, after drying, there is no problem in the color of the paint. vice admiral 2014-03-01 16:40:44

thank you for informing. I'm going to paint, ren glossy black, I wonder if it will grin, I didn't know if I made my matt black