The amount of material that is removed by electropolishing is directly proportional to the runtime and the amp-minutes that pass through the piece. Given this, the amount of material removed by electropolishing may be controlled. Often, during a standard run, material removal is only to 0.0003" to 0.0007". If the goal of an electropolishing run requires a longer runtime, as much as 0.003" of material may be removed. It is always important to review the dimensional tolerances of a component before it is electropolished.