Laser Cut Card for Window Detail

I was unhappy with the finish I got with the masking tape and spraying the windows. I wanted a crisper detail. The window details are almost flush with the glazing which dictated the spray on detail. However as this didnt work I looked into the possibilities of adding a layer on top of the glazing. 1mm thick acrylic would sit too proud of the glazing line at this scale, I mocked up a layer cut from card. The potential problem with this was the sticking down of the card layer to the acrylic. I opted to use emulsion glue. As the glazing can be seen from the inside of the floor space, and as a way to hide the emulsion glue I also chose to cut a card layer and stick it on the inside of the glazing as well.