Gratz on the new Jaws poster!
While you are on your own with the color choices, I suggest the following:
1. Take the poster to a trusted framer. You want to make sure that they don't dry mount or damage the poster in any way as part of the framing process.
2. Specify how you want the poster secured within the frame. Some framers will use tape which is supposedly removable but can damage the edges of your poster.
3. Use acid free or archival backing board and mats(if you go with a matting). Mats may provide enough of an air gap that you don't need to use additional spacers.
4. Museum glass is a great product, and I have a handful of posters and prints framed with it. However, don't feel that since you are using Museum glass or UV plexiglass, that you can put your poster in direct sunlight or under bright lights because you'd be protected. Any light, will over time, fade paper. Using quality framing materials will help to protect your Jaws poster for the long run, but don't overestimate what they can do.
5. Based on the oversize one-sheet and materials, this frame is going to be expensive and quite heavy. Make sure to use a suitable wall anchor to protect your poster and frame. If a glass frame comes off the wall, it is going to shatter and will possibly damage the poster in the fall.
Good luck!
