I'm not saying there won't be pitting in the chrome where the rust spots were, there certainly will be. I'm just hoping for no good material to be lost the way a vinegar soak would.
Chrome may be shiny and all but it's not anodic to steel and will let the steel beneath it rust to oblivion unlike some other metals we can plate with that aren't as shiny but will be anodic to steel, like zinc for instance it oxidizes pretty easily but will protect the steel it's plated over even if it's surface is broken with a deep scratch exposing the steel.
The 5 gal Evaporust for under $70 is a screaming deal! We just don't see things like that in the States, I don't suppose We ever will at this rate. Grab those good deals while you can Gents, they may not come around again. I found a YouTube video about making your own Evaporust, he tested a bunch of things head to head and Evaporust of course won, but he did find some interesting results with a 5% EDTA solution (I forget which variant) it worked well but was much slower. He calculated that you could use this stuff with tap water for under a Dollar/gallon, which is perfect if you need to soak an engine block.
In a few more hours I'll be checking on my parts, wish me luck.