I used canopy glue very sparingly to glue the real glass coverslip pieces into the cab windows in my McKeen Motor Car. There was very little evidence of the glue when it dried. You have to work fairly quickly so the glue doesn't dry out before the glass is in position.
Dave
I'm just a dude with a bad back having a lot of fun with model trains, and finally building a layout!
Thanks for the suggestions, all!
Like the majority, I like acetate. Office Max print shop sells transparency sheets for a little over a buck a sheet. Unlike the rest, however, I don't use glue. I get that thin double stick tape used to apply window insulation film. HD & Lowe's sell individual rolls in the same aisle with the film. I find it much faster, no mess, no wait for drying. The tapes dirt cheap too.