Why not, Robert?
Clients or attendees have there hands in the panel when I turn my back. No more for now,
I measure voltage on lighting circuits.
I always took the cover off and inspected the inside and put the cover right back on, assuming it was safe to remove the cabinet cover to start with, and then moved on.
Otherwise, I would miss a lot of defects inside the cabinet. Some of which could be a fire hazard, etc.
I required the clients to remain to the side and 3 feet away, minimum.
But, whatever works for you, I suppose.
There is only one inspection I can remember where I did not remove the dead front. It was taped on, not screwed on and very, very old. The tape too was old which mean it could not go (stick) back. if I had removed it, I would not be able to put it back so I did not remove it.
There was a big debate between me and buyer’s agent when I explained why I would not remove it. He wanted me to, but I stood my ground. They ultimately declined that property, but still used me for another.
On the topic of pointy screws (drywall screws, and wood screws) and very long bolts or very long screws. I document supported by pictures which include the correct type and a rule. I then make sure all wires are pushed out of that area and re-install. I then say so in my report. The only way I give a free fastener, is if I am unable to move the wires out of the way, or lost a fastener, or not able to put back dead front without doing so.
While I’m sure that happened to you, you could simply wait till you’re alone to remove the cover. And why would you turn your back on a open panel anyway?
As Larry stated, far too many issues to simply disclaim all of them.
I do not think spraying lubricant on someone else’s panel is a good idea. I would leave that up to the electrician. You could note in your report that they are rusted and need to be replaced.
As far as removing dead front covers, I put this in the category of walking roofs…stay safe out there.