cleaning radiator grille and other plastic parts

I was wondering what you treat the radiator grille with when detailing the car. I was thinking about the same polish and wax I use for the paintwork but wondered if there's anything special I should use.
What about the exhaust pipe

PEARL is my go-to for plastics and rubbers.

Optimum No rinse or Optimum No rinse wash and wax(preferred); mixed accordingly with water, soak a microfiber and wipe clean.

Soft ferret tail brushes, small ones. Patience, lots of patience. Stoner Tarminator to soften the bugs up.

All my exterior plastics were coated and have maintained a slightly darker look then before they were. I don't think that I would have the patience to go through all of that honeycomb and apply a product. Sounds exhausting.