listen guys..i have evn worked with BMW in berlin....i have seen rusted brakes of that car too, rust is due to prolonged parking in any sodium, or chemical enriched air envirnment, may be where this bike was parked is polluted envirnment, may be there are factories around, or leather tannery, or elctro plating shop,...or some chemical shop, something which generates chemical in air, or water..or may be sewage line is open nearby with chemical waste, and due to moisture in air...this result has taken place....
so listen when anything like this happens use WD40, spray, and buff it off with adry cotton cloth, ok.
As far as the quality is concerned, i have seen a worse quality in honda cars, corolla.....so...forget about quality in any pakistani product....quality and pakistan are two poles apart.