Shielding requires a certain level of commitment, time and skill.
A string tree is one screw. You wouldn't even need to change your strings to try it either way.
And practicing your guitar is never bad advice.
The polishing wheel is really non destructive. I think it's probably made of cotton? I could be mistaken on that, but my point being, you would have to almost try to do damage to something.
It certainly won't harm a rosewood board. Maple I do tape up, buy really that's just to avoid any...
Actually, now that I think about it, I usually end up watching a review or demo of something I have already purchased. I like to hear if it sounds/performs the way it does for me.
Occasionally, I'll learn a cool fact or a hack.
But it's entertainment for me, I usually make up my own mind...