Ed...The stick on uses the same tech as post-it notes... so you stick it on, and when ya want it off, you just pull it off... easy peasy... It won't harm the finish... The 'pad' needs to be cleaned with a damp cloth from time to time, and it's HARD to see in bright sunlight...
Intellitouch did the smartest thing when they backlit their tuner! I'll get the next model of Sabine stick-ons when and if they back-light the tuner...
;-)