Hi Tarkin, unfortunately no, you would definitely break it. The P1 isn't really that difficult to pop open if you have something flat like the X-Acto Chisel blade to stick in and carefully pry from both sides to pop the welds. Just don't stick the blade or chisel in too far and don't pry just at one point. Pry a bit at one point, then wedge it and move along the edge, prying and wedging until it finally pops. You will have to do this to both sides. If you pry too much at one time or in one place you risk putting stress marks in or cracking the plastic. If you are careful, you won't even need to glue it back together. Friction will hold it together which makes re-entry even easier. The acrylic window is wider on the inside and is held in by that black piece with the 3 small square openings. A single Philips screw holds that black piece in place which seems to be a light shield for the LEDs. I would say the hardest part is initially popping the P1 plasti welds. Once done, changing the label is a piece of cake, and so are other mods, like aluminum foil under the crispy, painting the sides of the crispy, replacing the trigger and removing or modifying the acrylic nozzle.
The P2 is definitely the worst to pop apart, even with the nozzle and cooing fins removed. Its a royal PIA.