Hi ;
Just answered a post about clear parts frosting up from CA or regular Glue Fumes . Oh So True . I can't even remember how many of what I thought were pretty good early aircraft builds got ruined by that .
Now I very rarely photograph my planes ( Military or Civilian ) Why ? Just never do !Cars the same .
Now here's the problem . A client wanted NO interior details in a 1/48 scale model .But ! He wanted the windows frosted Clear not blacked out . I had put many hours shaping the hull and cabin parts . Foiling them .( The Boat had a Natural Brushed Aluminum finish) from waterline to decks etc .
Do you think I could get a good frost when I wanted it ? NOPE!! I finally had to settle for Flat clear paint with just a drop of white in it . I did find out though , if you let the glue set awhile then hit it with a stippling brush , you can get the optically imperfect " pebbled " finish on the inside of your glass .
Another small and for me , Very Old , fix is this . Scotch Magic Mending Tape . Yup . If you are careful you can even put it on large areas and no one will see where the two pieces of tape come together side by side .You just have to remember one important rule . Burnish that tape down as you apply it . Why ? Well , if you don't you will have to deal with Bubbles !
Always let the tape overhang the piece and trim it clean with a New X-Acto or Xacto type blade . Good Luck !