Look what I found cleaning my C today :(

razor blades are the kinds of things that are probably only made in china these days.

Anyway, lets think about this.

Did you get your windows tinted? I thought I remembered that in your delivery post.
At the port or dealership or aftermarket?
Was the window tint a film type or some other method that I don't know about?
If it was a film job, part of doing that is sticking the film, smoothing it out and then trimming around the outer edge with a razor blade. Easy to drop a blade during use or changeout.

The other possibility is that the execs at Toyota are providing all the free coke the japanese can do to increase production of prius c's!:smow::eyebrows::dance::smow: Gung Ho

 

Yep
false alarm

 

...if memory serves (may not) oxalic acid helps to get out rust stains.
I obviously would not recommend trying it on the car without doing some research.

 

As for the rusty razor blade I detailed cars for 14 years and if kept wet a cheap razorblade as the one above would rust in just a few days. The stain will clean up with a cleaner wax or compound.

 

Yes it is. Other mild acids work too, though not as well, so if you're concerned about oxalic acid toxicity you can use citric acid. But if you're removing the rust stains in order to sell, don't use too much citric acid: you don't want a potential buyer thinking about lemons.