Muratic or Hydrochloric acid is not advisable for use on brass unless you are very careful and stop as soon as the surface corrosion is gone, once the surface crud is gone it then attacks the zinc part of the brass faster than the copper, hence why the brass takes on a pink hue after treatment. You then have to polish the brass to remove the high copper surface to take the pink hue away. Better to use an acid that will attack the zinc and copper equally, so citric acid is a better alternative. Acetic is not a good alternative as it goes for the copper over the zinc.
Another advantage of citric acid is it will create surface passivisation, which allows the surface of brass to resist staining by handling residues and atmospheric contaminants.