I wonder how much experience you have?
As a non-mechanic pilot I may not be considered "a trained, professional technical specialist..." (????)....
...however....
...rather early in my career, after I'd found tools left behind and cotter keys left off "completed" work**, I learned that when the machine becomes "mine," I should look it over thoroughly. And yes, this means opening panels and such.
If your employer takes issue with this to the point of probition or discouragement of the practice, I would urge you to attempt to get them to change the practice, on the grounds of safety. If you are unable to get them to change, look for a job where management has their head on straight, and until you get it, hope that the mechs don't overlook anything that will "affect" you.
**Nothing personal against mechs here. The fact is, they make mistakes just like us pilots do. A professional mech won't mind somebody checking his work, or an extra set of eyes looking over the machine on a regular basis.