A smooth surface.
There are no perfectly smooth surfaces, all of them have a surface roughness due to microscopic roughness that disperses light rays in multiple directions.
In fact, the roughness of the surface itself causes numerous micro-reflections in random directions, thus take off intensity from the reflected light.
For this reason, a less rough surface will appear more reflective than a rougher surface.
Four steps.
The operations may be different depending on the expected result. It is possible to distinguish four process macro-phases to transforming a raw surface into glossy and degreased: Grinding, Polishing / Brushing, and Brightening Washing / Degreasing.
