Restoration.

Restoration can be as simple as light cleaning to remove disfiguring dirt or grime, such as on the surface of a painting, or it may include near complete rebuilding or replacement, as might be the case with old furniture. Often done in preparation for sale, or by a collector upon acquiring a new piece, the main goal of restoration is to "restore" the original appearance or functionality of a piece.

There is a lot of difference between restoring and repairing. Functionality may be achieved by a repair, but restoring an item properly is an art-form. Finishes might/may be stripped and redone, but it is essential that the original patination is retained, if possible. Stripping is only done as a last resort, especially with antique furniture.