My old Chromebook finally bit the dust, so I got a replacement off Amazon.  It had a very annoying sticker on the wristpad that kept digging into my skin, so I got out my heat gun to remove it (which is something I do to computers on a regular basis).  I slowly started peeling the sticker off, but suddenly the plastic started bubbling up!  I freaked out because it looked like Hexxus from Ferngully was escaping my laptop, so I ripped off the sticker & let the plastic cool down.  I've never seen this happen before on ANY plastic laptop EVER.  I do sticker removals on a weekly basis & have never run into this!  Holy cheap plastic Batman!
As Billy Mays once said, but wait, there's more!  Once the plastic cooled down (note: there's still a noticeable, permanent 2" wide embossed bubble at this point), I decided to clean off the sticker residue, which oddly did not come off with the sticker.  Typically, I use a heat gun & slowly peel off the sticker & all of the residue comes off with it.  It looked like a standard sticker, so my guess is the cheap plastic or whatever didn't want to let go of the sticky stuff.  I couldn't find my bottle of Goo Gone, so I grabbed some rubbing alcohol & a paper towel and THE PAINT STARTED STRIPPING!  Now, obviously rubbing alcohol can be used as a paint stripper, but I wrongly assumed that, like most laptops, this particular laptop was just grey plastic, 
not painted.  Oh no, no sir.  This was a light-grey plastic laptop 
painted with dark silver paint.
So now my brand-new Chromebook has a two-inch welt with a swirl of stripped paint on the wristpad 

  I guess they really aren't making things like they used too...