Re: DE-RUSTING PRIOR TO PLATING ??
Harbor Freight has a cheap air media gun for de-rusting metals. That would help clean up parts that you can't get into bends and crevices.
The really good thing here is the non use of acid (vinegar is a weak acid) and that to me is the genius of the whole thing.
I can see cleaning and plating the bolts that hold the Manic Mechanic sprocket and hub adapter. The sprocket and adapter look great, but the fasteners have already rusted. Likewise same is true for a lot of the 5mm socket screws holding the rack and under seat fuel tank.
So how to clean these parts for plating without using sulfuric acid?
Easy does it, but do it!