Workpiece surface grinding, just to remove the oxidized skin or polishing, use nylon angle grinding discs.
Nylon angle grinding pads or called nylon fiber grinding pads, nylon itself weaker cutting force, and is not easy to produce too strong cutting on hard metals, and so can be sanded and polished at the same time.
So you can grind and polish at the same time, and when you grind in one direction, you can produce a certain brushed effect.
The overall workpiece is relatively simple to polish, the use of a single material.
If you use sandpaper to polish, you need to follow up the polishing, in the polishing requirements of the workpiece is not high, you can use nylon products, a polished finish.