Ya, it really depends on what you are cleaning. I etch benitoite because it is worth it. Like opening a Christmas present in slow motion. It's also an art form because you have to control what to reveal and how much. I don't do the last step though which involved ammonium bifluoride which if inhaled will kill you. Nasty stuff, but it makes the specimens shine.
So many rocks, so little time!
Yeah I did some minor research when I considered shining my rocks. It's something I would need a proper outside-area with plenty of ventilation and just won't work with my current living situation.