Brush Plating is an electroplating process performed with a portable, handheld tool, rather than with a tank of solution. This process is also referred to as Contact Plating, Selective Plating or Swab Plating.
In it's simplest form, brush plating is similar to painting. The plating solution is delivered to the work area by means of a porous, absorbent cover, or brush, wrapped over the anode of the plating tool. The operator soaks that plating tool in the plating solution and deposits the metal by brushing it against the base material.
A portable power pack, with two leads, provides a source of direct current. One lead is connected to the plating tool and the other to the part being plated.