In mechanical field sandblasting is considered an intermediate procedure in the product working process and it is rarely used as final operation.
It can be used to remove oxide, paint, calcifications, a galvanic or plastic coating, etc. At the end of the operation, the underlying material to the removed layer results completely open and with dependent wrinkledness from the greatness of the used grit and from the pressure of the throw, but still very accentuated compared to the values typical of the mechanical processes.
Therefore, sandblasting is one of the most widespread treatments to prepare an element to the following varnishing operation and it is mainly used on steel, cast iron, metal alloys in general, timber, ceramics, stone and marble; for mechanical and industrial use, construction (bricks or stone) or nautical (to clean boat hulls) but also to create works of art (carved or glazed glass) or interior design with truly surprising results.
The inert material used is mainly silica sand, but it is also possible to use quartzite powder, sodium bicarbonate, corundum or silicon carbide. How much harder is the grit used and the more sanding will be effective on hard surfaces.
This parameter is closely related to the hardness of the material to be preserved.