Piss off Mafia, the thread didn't ask 'are these cams suitable for my build which you know nothing about', did it??
Thanks Allan - still feel smooth to touch, appears to be some discolouration from sitting unused for a period of time. Mainly seeking feedback if people have seen this sort of thing deteriorate rapidly or if it's purely cosmetic. Now I've shown the previous owner he says they've been run as pictured in his race engine with no issues which is somewhat reassuring.
Edit - thanks Scott, I'll speak to the head shop about micropolishing.