Lock screws run from the opposite side of the lock.
There will be no marring underneath the escutcheon - at least none that I have ever seen. How would a properly finished (filed and sanded/smoothed on all edges) wedge head mark the plate?
Thom, I think you are envisioning problems that do not exist. With an escutcheon, any marking that could happen (doubt it), would be underneath the head anyway.