Product review (3 stars): Touch up makes it better, not perfect
This is really just glorified touch-up paint. That said, it does have the capacity to extend the life of a dishwasher rack. My 9 y.o. Whirlpool has developed a number of worn spots both on the ends of the tines and at the joints where the tines rise from the frame, all from contact with dishes, I suppose. A replacement rack is $300, which makes no sense.

I had not really noticed that the rack is a very pale blue, not white, until applying the paint, but aesthetics of the inside of the dishwasher are not important. As an aside, do so either outside or with a window open; the chemicals in the fumes are plenty toxic. On the small rub spots, it has done a passable job covering and presumably containing the rust. It did not work well for anything larger, however, so use it early and often to extend the life of the rack and therefore the dishwasher, but do not expect it to perform any miracles.