Stripping paint.

By far the easyist way is blasting. If not an option I use wire wheels in an electric drill or in an angle grinder. A die grinder with a wire wheel gets in the more fiddly areas.
Get some paint on as soon as its stripped or rust appears very quickly.
 
Paint stripper is as effective as Robinson's cordial - suggest have it sand blasted and re-powder coated (IMHO!).
 
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