I've used Evaporust for quite some time for auto restoration projects over the years, and one thing I've experienced that seriously seemed to reduce the effectiveness of it is using it on cast iron (calipers, master cylinders, wheel cylinders... etc). With anything steel you can reuse it many times over, and it still works great.

Anyone else see this?

-Paul

Oh yeah... what I wanted to say before I went off on the cast iron tangent is if you don't have PVC pipe or a container long enough for the legs you can simply lay out some 2x4's to make walls around the part you want to submerge, and line the walls with a cut up contractor bag. You can make it as long or as short as you want, and when you're done with it just pick up the 4 corners of the bag containing the used Evaporust and carefully pour it out into a large funnel lined with a coffee filter for reuse.

The bag is stiff enough to not ooze out between the boards yet strong enough to not be easily punctured by the parts you're cleaning.

-Paul