Excessive (isolated) 273 Adjustable Rocker Arm Tip Wear: Diagnosis & Repair?

I purchased a complete second-hand set of 273 adjustable rocker arms, shafts, spacers, bolts and washers for my '65 Valiant Signet Convertible (the set on the convertible I removed and "borrowed" for another motor rebuild).

While getting ready to clean up and install them on the convertible, I noticed one (and only one) rocker arm tip was worn/gouged. My second observation was that one of the oil holes on that particular rocker seems to be blocked/plugged/dirty. I guess that would explain the problem.

My question now is, can that damaged rocker tip face be corrected by grinding/polishing or whatever.

And, if so, do the other 15 rocker arm tips need to be re-faced or can I use them as is?
Thank you.

Messed-up rocker arm is on the right in both fotos:

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