Most transparent filament that can be printed on consumer printers? Including post-processing

Hi, all

What's the most transparent filament nowadays that can be printed on consumer printers? Including post-processing like sanding and coating (but not necessarily if not needed).

I've heard that PC can be very transparent if sanded down very finely (and I guess its surface can also be melted)

Just to be clear, I'm not talking about resins.