Do I need an air compressor to use this?

Yes. This tool requires shop air supplied from a compressor with adequate CFM output. Check your compressor's specifications against the grinder's air requirements — most automotive shops have what you need.

What kind of prep work can this handle?

Panel grinding, edge blending, rust removal, and detail polishing all fall within this tool's wheelhouse. The compact size makes it ideal for bodywork prep where a full-size grinder would be clumsy.

Are the accessories carbide or abrasive stone?

The kit comes with grinding and polishing attachments, but the exact material composition isn't specified. Test them on scrap material first to confirm they suit your specific application.