I have tried just about every rust remover on the planet and just happened across this in the store the other day and thought I'd try it too. I'm rebuilding the front axle on my tractor and didn't want to use an acid based cleaner because I didn't want the bearing bores over sized. This stuff flat out works. It works so well I've thrown stuff in the bucket just because it works that I normally would not have cared about. I LOVE the fact that it has no chemical smell, the bucket is actually in the house and my wife didn't realize it since the bucket stays by my reloading bench anyway. Not the fastest thing in the world but the safest I've ever ran across.

Be aware that this is not a rust converter that you can just spray or brush onto rusty metal, the rusty parts must be submerged in the liquid. I used it to clean up some very rusty old mower parts. The directions say that it takes 30 minutes or overnight for heavy rust. I left my parts submerged for 3 days with daily agitation and scrubbing with a wire brush. After 3 days some parts were still not completely rust free, but the remaining rust was minimal and easily removed with a wire wheel. The de-rusted parts have a dull pitted appearance similar to sand-blasted parts, but without any change to un-rusted areas.