What tool is recommended to clean the exposed surfaces of an assembly after deburring?

Using cotton gauze is recommended for cleaning the exposed surfaces of an assembly after deburring because it is a soft, non-abrasive material that will not scratch or damage delicate surfaces. Cotton gauze can effectively remove debris, fine particles, and oils without introducing new contaminants or altering the finish of the material being worked on. Its absorbent nature allows it to pick up any residual dust or debris effectively, which is essential in maintaining the integrity of the assembly.

In contrast, other cleaning tools may pose risks. For instance, paper towels can leave lint or fibers behind, which could be detrimental in precision assembly work. Sandpaper, while effective for smoothing surfaces, is too abrasive for cleaning finished parts, as it can inadvertently cause scratches or blemishes. A metal brush can easily damage sensitive surfaces and create more debris rather than cleaning effectively. Therefore, cotton gauze stands out as the safest and most effective option for post-deburring cleaning in aerospace assembly.