Repairing plastic fender flares

[surge101]

Noticed a pretty deep gash in my fender flare today. (not color matched) Is there anything to repair the scratches on these?

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[Factoid]

I’ve had good luck welding cracks in plastic bumpers. Done correctly it makes a strong bond.

https://www.kingplastic.com/tips-for-welding-thermoplastics/

As for filling deep gouges, most products are meant to be painted over and will look worse than the gouge. Shallow scratches can be sanded out, but the finish isn’t preserved. Your best bet is to replace them when they get so bad you can’t stand looking at them. In the meantime, wear them as an off-roading badge of honor.