Eh up Typecastboy
I do a fair bit of spraying, I would rub them down with 800 grit wet a dry, wipe with panel wipe. If you go through to the plastic itself make sure you get some plastic adhesion promoter. It’s fairly cheap, give it a light coat let dry, then a couple of light dust coats with primer. Let dry overnight, then use a really light sand with 1000 grit to flat off, make sure you sand into then gap in the sensor , don’t over wet .
Hit with a base coat colour assume you will get a mix match, if you do check it needs a lacquer, if it does get a decent one and make sure you hit it while the basecoat is still drying, don’t let it completely dry off. If the lacquer finish looks poor, leave it a week or two then flat back with a 3m cutting compound.
It’s worth the effort to get the finish.
Hope this helps mate.
Cheers