OEM Rock Rails Discoloring?

[jason9m9]

I received a Big Bend and knew immediately I wanted to put the rock rails on it to just fill in that look at the bottom. Of course to save some money I bought some secondhand on EBay and put them on without issue. I’ve been having issues cleaning them though. I’ve tried everything to get a few of these what seem just light discoloring scuffs off without any luck. To my knowledge atleast from what I’ve used nothing I’ve used should have started this fading prematurely like you might see with WaxCleaner or Polish on the plastic fenders which I know is a big no no. Now the sun seems to be bringing out a very big piece of discoloration happening on one of them. Is there anything I should be doing to clean them or maybe this is time to just buy some black Rustoleum and coat them? I just did not really want to have to take them back off since I had only put them on just a couple months ago.

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