Steve Strickland
Hey that's getting there!

Remember, reflections are always polarized so they can be controlled with a polarizing filter. You can take a window totally opaque from reflection and make it completely transparent with a polarization filter. You can eliminate all reflections this way from a flat piece of glass.

Reflection from a curved surface will have a lot of different polarization angles, unlike a flat pane of glass, so you'll have to keep rotating the filter to find the best angle. You probably can't eliminate all reflections from compound curved glass but at least you can choose which ones to allow and reduce the intensity of the others.