Can aluminum products not be oxidized after sandblasting?

Can aluminum products not be oxidized after sandblasting? Why is there a sandblasting process before aluminum oxidation? In fact, not all aluminum products must be sandblasted and oxidized.
The surface of the aluminum parts after sandblasting and oxidation has a frosted surface, which is high-grade and dirt-resistant. It can present a variety of colors, or achieve certain functional purposes. If you only sandblast without oxidation, you will find that the color of the product is dull after a long time, and it is easy to leave marks when you touch it, and it is not resistant to dirt.
The principle of sand blasting is to use sand to hit the surface of your product, so that the product has a frosted appearance, and the texture of the product surface is treated uniformly, which is convenient for subsequent processing. What are the main uses of white corundum sandblasting? White corundum is made of industrial alumina powder, which is smelted in an electric arc at a high temperature above 2000 degrees. The alumina content is 98.65%-99.37%, and it also contains a small amount of Fe, Si, Ti, etc. White corundum is suitable for manufacturing ceramics, resin-bonded abrasives, grinding, polishing, sandblasting, precision casting, etc., and can also be used for making high-grade refractory materials. White corundum is used for the processing of large workpieces: large workpieces such as oil tanks, chemical tanks, ship hulls, copper structures, metal houses, containers, automotive industries, etc. for rust removal, paint removal, maintenance and automatic matte treatment of large flat glass. White corundum is used for beautification processing operations: all kinds of gold, K gold jewelry, matte or matte treatment of precious metal products, non-metallic matte processing of crystal, glass, corrugated, acrylic, etc., and can make the surface of processed objects into a metallic luster . White corundum is used for stress relief processing operations: aerospace, national defense, precision industry parts, rust removal, paint removal, matting, renovation and other stress relief processing.