macbook screen scratch

Don't use a screen protector or keyboard cover- it could crack the screen because it fills the space between the keys and screen when closed.

As for the dust, you can use a soft, lint-free cloth to wipe smudges away. If they persist, you can use a 70% isopropyl alcohol solution. Never spray liquid directly onto the screen!

Cleaning Your Apple Product - Notebook Computers

A screen protector can have the effect of stressing the lid hinge and cable, so from that standpoint they are not good things to have. Most responders here will discourage the use of cases and protectors.

Unfortunately, any device that is used will experience wear and tear and that to me is more or less "battle scars". I'll take the possibility of "scars" to get the benefits.

We have five Macs: three iMacs and two notebooks ... 2015 to 2020. Non of ours are scratched but there is a tiny bit of wear on certain finishes. As it has zero effect on usefulness or productivity, we just ignore them. I in fact, don't mind the wear and tear ... means I'm getting full value for my money in using the devices.