If someone engages in actions to polish a surface, they are likely to:

The correct answer is associated with the process of making a surface smooth and shiny—actions typically referred to as polishing. Buffing a surface involves using a cloth or tool to create a friction that smooths out imperfections, enhances shine, and gives a polished appearance. This is in line with the concept of polishing, which aims to improve both the aesthetics and texture of the surface.

In contrast, roughening the surface would involve creating a texture that is opposite to a polished finish. Leaving the surface untouched would not correlate with the idea of actively engaging in actions to improve or alter it. Weaken the surface implies diminishing its structural integrity, which is not associated with the act of polishing, as that generally aims to enhance rather than detract from the surface's quality. Therefore, buffing aligns perfectly with the meaning of polishing, making it the most appropriate choice.