I like, "Bringing back to a former position or condition".
Open enough to allow work to be done, closed enough to define result..
So many guns shown here are not restored. A loose "refreshed" maybe, but not restored. The purpose of restored is original condition.

Example: You open a field grade boxlock and see that the "pet and pest" areas are covered with scratches and file marks. Polishing or sanding them out is not restoration.

Out there doing it best I can.