Product review (5 stars): A Repeat Customer
This is the stuff to buy if you need to cover rust spots on your dishwasher racks.  I'm only second bottle of blue.  I originally bought something similar from a local repair place but it's so runny it won't stay where you need it.  Uber Good is what you want, it stays in place.  Follow the instructions.  I usually take the rack outside to work on it as the smell isn't marvelous.  It lasts well and I don't think it comes off, rather new spots need attention every couple of years.  I've also used the same thing in white on the inside of the door of my dishwasher.  I have a 30+ year old KitchenAid and it works perfectly but the racks are showing a little wear and the inside of the door has a little rusty color here and there.  I've had repairmen tell me to hang onto it since it's one of the ones Hobart made, before KitchenAid was sold to Amana? I think.  Anyway, I'm doing what I can to keep it going.  I insisted on KA when we built our home and it's the only original appliance still going.