I have used all the methods mentioned up to now and I find they all have little problems of their own to overcome. As I have become older I don't want to put a lot of effort into things. So my method of removing rust is as effortless I feel that you can get.
I use Phosphoric acid at the usual high strength sold at 85% yes it is hazardous because the powers that be say so though Tomato growers use it found in some Colas to name just two. Also is the basis of a lot of commercial rust treatment and removal products sold at high prices so if you are sensible it is not like handling concentrated Sulphuric or Nitric Acids.
Its main Benefit is if it is used to treat a rusty surface the resultant layer can be removed with a stiff brush and WATER!!! Then heat the cleaned metal to dry.
