.

Keeping this in view, is a grinder the same as a polisher?

Most angle grinder used for polishing is rotary tools because they spin clockwise around a center point. On the other hand, orbital polishing tools, also known as Dual Action polishers are characterized by the movement of the head.

Secondly, what is the difference between a buffer and a polisher? In a rotary buffer, the pad rotates together with the spindle, and they go in just a single direction. The pad in the rotary buffer would not vibrate and would tend to be stable and would not oscillate. In an orbital polisher, the spindle moves in one different axis while the pad moves to another different axis.

Additionally, can a grinder be used as a buffer?

well there isnt if you try to use a grinder as a buffer. the 4" angle grinder has no control over speed. the buffer is way more controllable. IMO if you can put a buffer wheel on the 4" grinder you may still remove paint.

Can I use a polisher as a sander?

The Mirka^® PS 1437 polisher can be used for sanding when a dust suction hood and a special backing pad are added. The solution works perfectly for various coarse sanding applications, e.g. paint removal. The brushes ensure a good suction and also protect the surface.