Yes, u're right.
So, I don't know why Yokomo make the rims so bad.
Due to the chrome flake and peer off the the paint on it, so the repaint is directly apply on the plastic (White part)......it should be fine after re-paint.
Try your wife's nail polish remover... the chrome comes off easy.. but make sure you don't press hard on it because you might put your finger prints on the rims..
Easiest way is use a paint brush, cut the length in half to make it stiffer... then brush it til all chrome comes off.........
And don't tell your wife you use up the nail polish remover.... Or go downstairs to "Watson's" and get your own bottle....