John,
I've tried electrolysis, EvapoRust, and citric acid. All work great.
But...
Electrolysis is a fairly serious science experiment (wires and electricity, etc.).
Evaporust is pretty expensive. I picked up some at Harbor Freight, and I think it was about $20 per gallon.
Citric acid powder is relatively cheap and can be purchased at a home-brew or winemaking shop.
I haven't really noticed a quantitative difference between the methods as far as results go.
Good luck with the project.
Ken