I just completed this puzzle (although it's missing 1 piece, which I wrote to them to see if they can replace because the alternative would be to buy a 2nd copy and shift through 4500 pieces to find the one I need). I want to hang it on my wall!

Edit: Found the missing piece!!!

Right now it's on my living room floor (pencil for scale) on 9 pieces of poster board that I taped together. But, I am not sure if this is the best surface to permanently attach it to. Does anyone have any recommendation on how to glue/seal this & mount it?

I also want to apply some kind of protective coat in addition to just gluing it together/to something to prevent damage, so if the method to do that is different from the method to mount it I'm also interested in that.

I've been doing some high-ish quality wooden jigsaw puzzles, and I'm a bit worried about them getting damaged, so I'm using a puzzle mat. And...I hate it, so much. It's crazy hard to move completed sections around if you need to rearrange, which is often an issue since i always solve without looking at the image. This is the primary irritation, but it's significant, and there's also some secondary irritations like the board is just kinda annoying to deal with and it's itchy lol.

So, to people who do jigsaw puzzles, how do you protect your pieces? Do you use a puzzle mat? Something else? Just do it on a hard surface and all is fine?

(also meta-note: this is my first topic post here so I hope I've done this correctly, tell me if I haven't!)