Great idea. That one will get stored in my memory bank.
While it might come off quickly after two weeks, these adhesives tend to dry out over time. The plastic tape also deteriorates quickly. It is best to use something designed for removability over time. If these covers do get damaged, you want to be able to replace it without destroying the face plate you are trying to protect.
I use PDA covers and cut them to size. Apply them with water with a very small amount of dish soap added. It doesn't take much of the solution and it will help eliminate bubbles.
I ordered and am now using Invisible Shield screen protectors on both my GPS and PDA. Before that I'd been using protectors manufactured by Fellowes for my PDA. I love the Invisible Shield protectors, they're MUCH clearer than the others and I can't see where they dim the display at all. If I have any complaint about the Invisible Shield product it is that the stylus don't move as smoothly on the screen of the PDA but I can live with that.