The wire rack nolonger has the coating on them at their tip and some rust seems to be forming?
You can "dip" the tips in white silicone, not exactly a repair, however it will slow down the rust and make the rack look better until such time you are ready to replace the dishwasher.
Can't you just get a replacement rack??
Try these guys, I use them.
But maybe you really just want a new dishwasher. Head to the library and check with Consumers Reports for the best models.