These are just so fun! Making a fun mirror bathroom :)
First I cut the mirror acrylic outline that the other acrylic piece will snap into. I keep kerf offset off for this part. Cut mirror side down.
Then I cut the other acrylic parts. I use kerf offset for this bit so they fit snuck in the silver frame. Cut mirror side down.
Note from learning the hard way: don't kerf offset so much that you have to force the pieces in- mirror acrylic is brittle and it will crack.
I use the 1mm black acrylic as a backing. I put 3M adhesive tape on before cutting. Cut 3M side down.
Put the pieces together. Take the adhesive off the black acrylic and stick it to the back on the mirror lined up.
Hang with command strips or double sided tape!