Ugh, just came back from 40 minute drive each way to a Miami store to support local business and the two pieces of Atlas O 6053 I bought don't have the top of the center rail painted black. The part number is correct. Sides are fine. ARGHHHHH. The 6050 piece I bought is fine.
Is this common? Any fix that holds up and doesn't interfere electrically?
Well, the top won't stay dark anyway once you start running trains, so I would not worry about it. On mine, about six years since having replaced all my Fastrak with Atlas, I now have shiny metal on all the center rails.