I've tried Evaporust and it works well, but at $30 a gallon it doesn't take long to burn up my hard earned money! I tried
the vinegar mix to see what it would do, and I thought it did great. It wasn't better than ER, but it was realy close.. I started small with a couple old tools, wound up putting a pair of front splash shields from my 69 in and soaking for about 12 hours. I was really impressed, I'll still use ER where I can't soak something but if it'll fit in the tub it's getting the vinegar treatment!