About stainless steel rust spot we can start from two points of view of physics and chemistry.

Chemical process:

After pickling, it is very important to wash properly with clean water in order to remove all contaminants and acid residues. After all processing with polishing equipment polishing, polishing wax can be closed. For local slight rust spot can also be used 1:1 gasoline, oil mixture with a clean cloth to wipe the rust spot.

Mechanical method

Sand blasting, shot blasting, annihilation, brushing and polishing with glass or ceramic particles. It is possible by mechanical means to wipe away contamination caused by previously removed material, polished material or annihilated material. All kinds of pollution, especially foreign iron particles, can be a source of corrosion, especially in humid environments. Therefore, the best mechanical cleaning surface should be under dry conditions for regular cleaning. The use of mechanical method can only clean its surface, not change the corrosion resistance of the material itself. Therefore, it is recommended to re-polish with polishing equipment after mechanical cleaning, and close with polishing wax.