Dmitry, does the geometry of the canopy parts allow you to put the joining material, white glue or gloss liquids, only on the edges of the armored glass such as where it touches the main canopy at the very top or bottom? It sounds to me as though your are putting the joining liquid on too large of a surface or that capillary action is drawing an excess of liquid between the armored glass and the windscreen where it is not needed. If this is the case, a longer drying time might see the graying go away, but I suppose you've thought of that, so I'd try to use a minimum of liquid on as small a surface as possible, especially if that small application can be hidden at a frame that will be painted later..
