I posted this in the General forum, but it was suggested I repost it here as well. Any help would be appreciated.

I came across an opportunity to get my hands on a Stanley 4 1/2 that happened to have quite a bit of rust, and yes some pitting, for the low low price of $0.00. Well, despite the corrosion, it's hard to pass up a price like that. I have restored a few handplanes to usable condition before, and I know it can be labor intensive and this particular plane was in worse condition than any of the others. Well, I had heard about this product "Evapo-Rust", and read several rave reviews of it so I thought I'd give it a try. It was certainly easy enough to use and at first inspection, after soaking all of the parts overnight, it looked much better. However, as I was rinsing the parts off I became aware that everything looked, for lack of a better descriptive term, like aluminum. The surfaces all were this dull silvery grey color that looked nothing like cast iron. I tried scrubbing it off, then brushing it off, and even polishing it off. nothing seems to work. Worse yet, anything that the surface rubs across ends up with silvery grey streaks on it.
Has anyone had a similar experience? Did I do something wrong. Although I don't know how I screwed up "soak overnight then rinse". Any suggestions on how to fix it?

Here are some pictures:




On a side note, it also seemed to accentuate the pitting. But, I knew there was some of that when I started and I can certainly live with it. The plane is unusable though, as long as it leaves streaks on everything.