So I have this Peugeot that I am going to restore (yea, yea I know, don't bother laughing at me about finding french parts!).

It has some minor rust, so I mixed about 3 tablespoons or so of oxalic acid into about a quart and a half of warm water, I then soaked paper towels in it, and wrapped them around the bike.

I did this on recommendation of a bike restorer near where I live. But I didn't ask enough questions.

First, off, is that an OK mixture? should it be more, or less concentrated.

Assuming the mixture is OK, how long should I let it sit and soak?