An old collector/dealer, can't recall his name, it may have been Don Newcomer, who famously said "Beware the black rifle."
He was referring to the 'black' being applied in restoration to hide seams and such. Today, that still hold true in collecting guns that had old restoration. Now, work is long past having to hide or disguise what was done. Nothing to apologize for today, the work I have seen is top notch and no more 'black.'
Dick