I’d say if your rocker covers aren’t leaking, keep using them as they are. I had an issue with one of mine where it was forever weeping from one of the corners. Both were presumed aftermarket copies of the original, one was dry, the other was not. I tried a smear of gasket sealant, grease etc but still the weep. They are near impossible to check for flatness on the sealing face due to the lip.
Eventually, I bought another aftermarket cover, and problem solved.
If they seal, there’s no reason why they shouldn’t keep sealing with new gaskets and more importantly, a good clean before refitting.
Sent from my iPhone using Tapatalk