Product review (4 stars): Didn't really use
Once I got this, I thought I'd start with using the caps to cover the rusted tines. I thought it was just going to be a few, but I ended up using all 30. In my investigation, I discovered way more rust than I realized was on it. The number of hours it was going to take for me to fix all the rust spots (sanding and painting them) made me decide to not bother. (I also found out that the model of dishwasher I've got has design flaws, so that cemented my not using this product.) Anyway, I'd recommend carefully checking out your racks from multiple angles before embarking on this project.

Also, you should more or less ignore my rating since I decided not to use it. I will say that the little bottle I got had a cream/beige colored liquid, but parts of the bottle were stained/painted white on the inside. I think that comes from part of the paint drying out in the bottle.