Question

the end grinder is used to ____. polish intricate work grind surfaces smooth the work before painting smooth the inside of materials, such as pipe

Explanation:

An end - grinder is a power tool mainly used for grinding surfaces. It is not typically used for polishing intricate work (more of a job for smaller, more specialized tools), smoothing work before painting (sanding is more common for this), or smoothing the inside of materials like pipes (specific internal - surface tools are used for that).

Answer:

Grind surfaces