IIWY, I'd run a good oil as others have said..... I would NOT pull it apart if it runs fine. I would do a compression check to see if the numbers are consistent between all cylinders. Also, is this a mechanical or hydraulic cam?? If it's not hydraulic, just check your lash at the rockers on those suspect lobes against the others (and whatever you recorded when first assembled). If there's no difference, there's no problem. Keep in mind, these pics went from your camera to my computer lol.... who knows what color we are really looking at...that could be a fluke. All cams have a wear pattern to a degree. I would go up to your engine builders or whoever may have some old cams laying around and compare them to yours with your own eyes. I think theres something darker colored in your shop reflecting on the cam to look like that. Your second set of close-ups looks completely different. Play on!!
HTH, Lefty71