Rust dip success stories?

I used vinegar to get the rust off a slant exhaust manifold and a set of shorty headers. They both are such an odd shape I was looking at gallons and gallons to immerse the part. I solved the problem by putting the part in a very large heavy duty trash bag, then stuck that in a trash can. I filled the can (bag held up in the middle) with water which left the bag pushed tight around the part. It took only a little over a gallon to fill the inside of the bag, and did a great job getting them clean.