[/COLOR] Don't have a garage or carport anymore, so everything sits out.
I found that polishing my Volvo (2006 V70, plastic!) headlamps was futile. I didn't realize this until I got my new (OEM) ones in. The polished ones I was so proud of were crap in comparison to the new one.
I tried covering my car with a car cover at work to save the headlamps (and window trim and wipers), but it turns out that a good windstorm will blow the cover off. Then I found the solution. Amazon had a set of fender protectors for mechanics. Soft on the inside, magnetic along the bottom edge and elastic straps with plastic hooks on top.
I hang them over the headlamps when I park at work and it covers them and is heavy enough (with magnets) and secure enough (hooks, and pinched by the hood) to stay in place even when it's windy.
For the windshield trim (and to take a lunchtime nap in a cooler car here in Texas) I found a snow cover that cinches around the mirrors and stretch straps with plastic hooks to hook into your fenders or spokes in the wheels.
It covers the sunroof too, so I can leave the front windows cracked open AND the sunroof too, so I get a breeze and vent the inside a bit, without fear of dust/dirt/rain getting in.
https://i.imgur.com/AVchYrL.jpg (link to picture if the inline image doesn't show up right)