How to make the surface of the sheet metal chassis cabinet smooth?

Clean and maintain the indoor sheet metal chassis and cabinets well, and these basic maintenance tasks are considered successful. If the sheet metal chassis cabinet is used for outdoor use, we need to consider more factors, first of all, we need to consider anti-corrosion, dustproof, rainproof, and so on. For the surface of sheet metal chassis cabinets, we will perform special treatment. Generally speaking, the surface of sheet metal chassis cabinets that we see is smooth, but the surface that has just been completed is rough. This question arises, how can we make the surface of the chassis and cabinet smooth?
One type is mechanical polishing: it has good leveling, brightness, high labor intensity, serious pollution, difficult processing of complex parts, decreased gloss, high investment and cost. Simple workpieces, small and medium-sized products, and complex parts cannot be processed, and the gloss of the entire product cannot reach consistency, and the gloss retention time is not long.

Another type is chemical polishing: with low investment, complex parts can be polished, high efficiency, fast speed, insufficient brightness, polishing solution needs to be heated, gas overflows, ventilation equipment is required for complex products, and small batch processing is more cost-effective for products with low brightness requirements.

The last type is electrochemical polishing: achieving mirror gloss, long-term maintenance, stable process, low pollution, low cost, good pollution prevention, large one-time investment, complex parts require tooling, auxiliary electrodes, and large-scale production requires cooling and high gear small and medium-sized products. The product process is stable, easy to operate, and can be widely promoted and used.