[MrPontiac]

Yellow zinc plating 4 nuts, they have concave washers on them and the nuts spin, ok, ive had great luck so far plating lingage but these darn things are giving me fits. First off the area around the o.d. of the washers will not plate, ive tryed differant currant settings but if i go to high then the coating all over comes off to small currant zinc plating is not staying on, so my questionis this, should i acid edge these nuts first for a try?? Surface prep is as follows, i glassbeaded them ,then wire wheeled them to a shine but the area around the outside dia. of the washers are not being plated and it flakes off?? any idea or anyone else had this probelm?? 2.0 amps on my rectifier for 20 min.