Quoted from comment23:
What's the re-usability of Evaporust? For example, if I have a piece of 3" pipe that I fill up half way, then drop in some legs, can I do multiple cleanings with the solution? Does it become less effective with multiple cleanings?
Yes, you can reuse it dozens and dozens of times. After about 100 uses, it will lose effectiveness (takes longer to work) and gets clogged with particles of rust. Pouring it into a coffee filter and into another container then back into your original container will help squeeze more life out of it. Remember, Evapo-Rust should be kept in a container with a lid or else it will ...... evaporate! As you use it you will spill some of it as you pull the legs out. When I start with a fresh 4" diameter tube full of 4 legs, it takes 1.5 gallons of Evapo-Rust to fill it. Eventually as it gets used, the fluid level will go down due to spillage so I replenish with a fresh one quart jug of it.
It's also temperature sensitive. The warmer the ambient temperature (preferably over 65 degrees), the faster it works. As an example on those 80 degree summer days, I can do a set of 4 legs in just two hours! It does not hurt anything to leave the legs in there for a week or two (or even a month) if you forget about the legs.
When you pull the legs out, be sure to rinse them off and dry them right away. Now apply some chrome polish and you've got yourself a nice set of legs!