Re: Rust removal
For rust removal try Mollasses, a by-product from sugar cane. It is very popular with car restorers who do not want to risk damaging fragile and rare panels. It's cheap and effective, but slow.
You need a tank, preferably with a lid to prevent evaporation. Mix 1:4 mix with water (1 part mollasses, 4 parts water). Fully immerse the items and leave for up to a week depending on how much rust there is. Then, hey presto, the rust is gone. Check the progress every 2 days. Beware of using it for cast iron and aluminium.
You should be able to buy it from the local farm store, or where they sell horse feed.
David Fryer, Brisbane, Australia