[mrtexas]

There is generic evaporust out there by mail for 1/3 or less the price and are more concentrated as well. Works the same IMHO. I currently have some from rustdepot.com and it works out to $8.60 per gallon including shipping vs $25 per gallon for evaporust including tax and it is my second gallon from them. Since then I've found rust911.com and it is $3.72 per gallon. I'll buy that next. I bought several gallons of evaporust before I discovered the generic. The stuff will fix what others won't either. It fixed the stuck glove box hinge on my 36 Ford woodie for example.

Another advantage is you can mix it up more concentrated and it works faster. For $60 you can fill up your model A gas tank and have 6 gallons of concentrate left from rust911. Stuff works great and leaves no residue like phosphoric acid does. You clean the tank out to remove the dissolved rust and black residue which I assume is from the carbon in the rust that was dissolved.