Here's my problem, though: I could never decide on a design for my laptop. I'd come up with one, but a few days later I would think it was lame. That cycle happened a dozen times before I thought of a better way: Why not use the laser cutter to create a precision-cut sticker, instead? This "tattoo" would be removable, so I didn't have to be gun-shy any more.
This instructable shows what I did, including the source files for the design, a description of the special retroreflective tape I used, and a nifty trick for getting a perfectly-placed sticker.
Step 1: Make a Design
I used a funky perspective to bring the lit "power" logo off-center. That way the whole sticker can be centered while the power logo can be as big as possible while avoiding that bite in the right side of the apple.
Step 2: Choose a Sticker Material
In addition, unlike other stickers, the retroreflective tape I used for the new sticker has a thin metal film it it, so the Apple logo is masked completely. Other materials might allow the light to show through.
Step 3: Clear the Area
This step was easy. I peeled off the old sticker, leaving a clean surface.
Step 4: Laser-Cut Your Sticker
Step 5: Apply Using Water
In the pictures below, you'll see what I did: a spritz of water on the sticky side of the peeled-off sticker and spritz of water on the laptop lid. Then, I carefully laid down the sticker close to its final position. With the water in there, though, I had time to carefully adjust its placement and push out air bubbles.
With a piece of plastic, I carefully squeegeed the area and then patted it with a paper towel. The sticker was fairly fixed, at this point, but as the liquid fully wicked out from underneath, the adhesive bound to the laptop lid itself, making it even more permanent. Best of all, it looks perfect.