What method is primarily used to eliminate metal surface irregularities?

The most effective method for eliminating metal surface irregularities is grinding. Grinding utilizes an abrasive wheel or tool to precisely reshape and smooth metal surfaces, removing imperfections and achieving the desired finish. This technique is particularly beneficial for creating a high level of flatness and surface quality that is often required in machined components.

While picking and filing can be useful for minor adjustments and finishing tasks, they are generally less effective for removing larger surface irregularities compared to grinding. Picking and filing are more manual processes and may not achieve the same level of uniformity or precision. Other methods like welding and brazing serve different purposes, such as joining materials together, rather than directly addressing surface irregularities.