Yes, the paint finally dried, not sure why it took so long but the paint (Scalecoat II) had been on the shelf a long time and I did thin the heck out of it when I applied it. It also could have been the humidity at the time of painting as well, although the furnace had been running so I don’t think that was an issue. I found no finger prints and only a couple edges where the paint had rubbed off. Probably what Bruce took home on his hands 
The interior box was glued with and the exterior styrene applied with Weld-on #2354 from TAP plastics. It is described as “Clear, water thin, fast curing solvent for joining ABS, Cycolac, Kralastic, etc.” I can attest to the fact that it works well for plex to plex and styrene to plex. I think the only way you could separate the styrene from the plex would be to sand it off. Note: this stuff contains MEK, all safety warnings apply !
For attaching the styrene I used a 1 1/2" disposable paint brush, applied a coat to the plex, let it set a few seconds and applied a second coat then immediately placed the styrene and applied pressure to set it. You can see through the plex to tell if you missed any areas and if the edges didn’t seal you can go back with a small brush and allow the glue to flow under the joint by capilliary action. This stuff pretty much sets on contact so either be real careful aligning or cut oversize and trim to fit like you would if you were laminating formica !