Product review (2 stars): Just buy another dishwasher...
It is so aggravating that these didn't work for us!  We had a top o' the line Maytag that starting rusting on the racks after eight years.  I followed the directions and watched YouTube for more advice.  Used the Dremel and cut the bad tips off or shaved off the rusty parts and applied the paint and used tips where needed.  About six months later the tines on the racks started rusting again and after the washer's filter wasn't flushing well since the rust particles where coming out again we had to purchase another washer than purchasing two new racks.  Ugh.