The components on this one are pretty far gone. Oxalic Acid can only be used on steel parts, not aluminum. I'm sure this bike would make a decent rider, but I wouldn't pour anymore cash into it. Seems like the original owner had a penchant for bolt-on parts, so maybe the fork was an "up-grade" and not the result of a crash.
What are the pedals and shoes included? You could probably get some coin out of them.