Previous Restoration
The structural and aesthetic changes as a result of previous restoration, which may lose efficacy over time. This can include changes by the artist, which complicate a conservator’s guiding value of preserving the original intent of an artwork by the artist.

Overpaint from previous restoration efforts.

Patch on the back of a canvas as a tear repair effort.

Tear repair and patch visible on the front of a painting.

Example of discolored inpainting.