that's exactly what i was referring to.
the salt & vinegar will remove ALL the patina, leaving a somewhat frosted bare metal surface. you can then polish it with metal polish to get a bright newly mint penny look, but all that history is down the drain.
bronze 'roman' mace head bought from a balkan country for a few pounds via ebay. (it was an obvious chemically aged fake)
before:
after:
polished with a brillo pad and later with brasso metal polish to get rid of the frosted look.
object of the exercise, mounted as a walking stick:
had it been original, i would not have cleaned and polished it. for your sword, an original, what you have done so far should normally be sufficient.
p.s. - if you do clean it, you'll need to clean the whole thing, guard & pommel, etc. or else it will not match & look horrible. degrease, use plain white vinegar. and refined white table salt (un-iodized). and try not to get any on the other parts. it cleans fairly quickly and doesn't produce any nasty fumes - it does smell a bit and will stain your hands. gloves recommended. wash off well with water and dry well, oil the sword after handling. i used vinegar with enough salt to make a saturated solution.