How do you call these people?

[Enrique]

Sorry to disturb you guys, but on line dictionaries are not the best tool to write in English. In a museum, you have some people working on paintings, trying to compensate the damages caused by time. How do you call them?

[PDG]

Hi Enrique.

We'd call them restorers.

[Enrique]

Hi, PDG:

Thanks a lot. I have a bilingual at home and was about to suggest it, but I wanted to be sure.