Although you can buy stronger concentrations, most vinegars are 5% acetic acid, you can neutralize if you wish, add about a handful of baking soda per gallon, but a thorough water rinse also does the trick.
I used muriatic acid from HD, worked like a champ and FAST!.. however, I used I think 7-8 boxes of baking soda to nutrilize the acid AFTER I poured it out.. added it slowly!!
Hosed out the tank with water, then gas mixed with oil, then coated the inside with WD40..
If you really want effective rust removal without the aftereffects of acidic solutions you should try Evaporust. It is not cheap ($23/gal or $80/5 gal) but it can be reused many times. So if you have a lot parts that require rust removal Evaporust is cost effective. Here are a couple of photos from my own resoration project, a '71 CB350.
I did also use Evaporust on my tank and it simply requires a water rinse after draining and saving the Evaporust. I follwed the water rinse with about 10 ounces of isopropyl alchohol to promote fast drying.
Rear fender after partial treatment with Evaporust
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