there's a resin that you can paint on clear plastic. Essentially it fills in the little gaps that refract the light, and produces a pretty clear end product.
The only reason fdm prints with clear filament are not clear is the refraction caused by the round bead and the tiny gaps between layers. This paint on stuff fixes that and you end up with something nearly as good as glass.

So yes, you can do it.

Start with one of the new super clear filaments and finish it off with the resin.

Can't remember what it's called though.