Can we use a screen protector if it's not installed?

OK, here's the thing: let's assume I don't want to use a screen protector in the iPAD PRO 9.7 most of the time, but also want to use the Apple Pencil, and avoid any possible scratches reported by some users. Meaning that if one scratch was ever to occur, it would not be in the iPAD glass, only in the screen protector.

Can I take with me a screen protector/piece of plastic and put in front of the screen while using the Pencil?

By that I mean not installing, because once installed, we will not remove this thing anymore (or if we have to, that screen protector will become useless afterwards).

P.S. Check 0:35-40:

 

It can be, provided the screen itself does not glide to the sides while you are pushing against the screen with the tip of the Pencil and the fact that you haven't removed the 2nd layer from the screen (the 1st layer does not glue into your hand) to proceed with the install (once this is done, you either install or it's game over) does not introduce some sort of lag while using the Pencil.

 

I have one iPAD 4 with a screen protector here, and now this new IPP 9.7. Still haven't received the Pencil, but I can tell it's very hard to not have dust around, and the iPAD 4 (pardon my expression) looks like s.hit, the screen reflects much more compared to a naked one. The colours from IPP are vivid, and I doubt any screen protector can do a miracle to make this iPAD look the same, even though it can protect it.

The odd thing is that the glass itself seems sticky when I put my fingers on it, and the iPAD 4 with the screen protector is smooth. From day one since I bought the 4th (and this was 2013, my 1st iPAD) I NEVER leave at least one microfiber cloth out of my sight. In this case, this Pencil will have to be really made of something special to not scratch or leave any mark after some time.