Repro work: Reducing reflections in paintings

Heya,

Anyone knows of a good way of killing reflections off paintings?

See my problem:

Full painting
Detail

It looks terrible. The polariser didn't help any, which means they're direct reflections. I can't move the painting from its fixed place; so I'm quite at a loss as to what to do.

Any ideas?

TIA

Are you familiar with the "family of angles" ?

http://www.digitalphot​opro.com …the-family-of-angles.html

Yes. Read that book already, but I'm having trouble applying the concepts, mainly because the texture of the paintings is multiplying the angles into a very extended family.

Maybe need to soften your light then?

Well, we tried with a white curtain, but the reflections remained.

Here, here's the layout of the church. The pictures in red are the ones I was commissioned to photograph. The morning sun is coming from the right side of the picture (south side). I turned off all lights in the church. Station VI came out with reflections, but not as bad as the picture I linked to above, which is not being hit by the sun (!!). Yet, that's the one that came out worse. The painting of the Ascension, behind the altar is the best; there're still reflections on it, but they're relatively minimal:

Full painting
Detail
Detail

Station VI is terrible too:

Full painting
The soldier's raiment is totally washed out.

I get the same thing with textured finish

This might help, I remember bookmarking this page a while ago.

http://www.gyes.eu/pho​to/cross_polarization.​htm

Yup, that's what I ended up doing. Thanks for the link, though: good information there. I've been playing with the cross polarising and have found some shots to come out way too dark, no matter the camera settings. I'll read on.