Ok I will give you some credit for that one, but for your sakes to let you know, Mad Cobra is in Japan not China. But I will bring up another thought for you to think about. The corkscrew is not the only piece of track that is yellow. If you look at the sixth photo, there is another piece of track that is yellow, but wait! It's not entirely yellow. The only part that is yellow is the rail. Now when someone they paint roller coaster track; they paint the entire segment then stop if they plan to. This is just the rail and not even all of the rail. Now they could have ran out of paint, but here is the thing, there is multiple spots that are yellow. And I don't believe that since this ride is in America the primer color would be orange or yellow because that is a bright color for black to be painted over top of. Grey is a color us americans use and makes a lot more sense when painting something dark.
Another point that I would like to bring up. You may be still in your crazy minds be thinking that the paint wear off with the trains flying by. When that happens it usually goes through the outside paint (black) all the way through the primer color (grey or yellow) to the bare steel. In some parts where the track is black I see yellow in those worn spots. Now in other spots I see a grey rustic color of the steel meaning that the train didn't wear through all the paint which could mean multiple layers of paint. Now why would they spend the money to paint it grey then yellow to black.
Well simple I don't think they didn't. I think the track was transported from the Mad Cobra to Kings Dominion because there was issues with certain segments of track and they couldn't paint all the segments because they had to open the ride on time the following year leaving the corkscrew bare yellow and not completing the paint on that other track segment.
Which leaves me back to my other question: Why is there a different rides track pieces in KD's FoF?