nickel plating question
There is instruction on this address https://www.instructables.com/id/High-Quality-and-safe-Nickel-Plating/
how to make high quality and safe nickel plating,and i have some question about that.
When he showed to add salt to the vinegar in order to make the vinegar more conductive,isnt the salt become Na and Cl ions?
Will the Na positive ion stick to the negative nickel plate?(while making the nickel solution-step 3)?
Will the Na positive ions stick to the item that we are plating besides the nickel( in the plating process-step 5)?
will it spoil the object that we are plating with nickel?
I see in the supermarket vinegar which said"synthetic vinegar" 5% acetic acid,water.(for food).Is it ok?
when he said(step 4)"You can further clean your object by reverse electroplating (ie "electrocleaning") it for a few seconds. Hook your object up to a negative voltage, a WIRE to the positive voltage, and drop them both in a vinegar salt solution for 10-30 seconds. This will remove any left over oxidation"
What wire did he mean?
and the last one:how pure is the nickel should be?because i notice that most of the nickel sheet are about 99%-99.7% purity.is it ok?
can i use pure nickel strip(97% pure nickel)that is used for battery welding?
Thanks in advance.