Those fender inserts should be on both sides to cut down tire road noise. I removed both of mine to prevent dirt/ice from accumulating on the tire side of the liner. I just hose it out occasionally to keep it clean. My concern was any build up when they were there could cause rust on the inner...
Same with me. For $12 I bought 2 cans of Rustollum spray paint for plastic at Walmart. No need to prep anything. Just be sure the cover is clean from dirt and the paint looks fantastic.
I bought a 2013 Mustang GT when I lived in Hawaii and had it Ziebart rustproofed. When I brought the car in for the work, they let me cover the areas with newspaper like the oil filter area, trans, driveshaft, and differential once the car was on the lift prior to spraying. The car smelled for a...
If you’re buying new, most car dealers in rust prone states offer rust proofing to undercoat the car or you can choose Zirbart that undercoats the car as well as the inner parts of the hood, trunk, fenders and doors. In Hawaii, most have gone to electronic rustproofing which works very well.