...... of old paintings is a job for experts.

Solution (By Examveda Team)

Restoration of old paintings is a job for experts.
In this context, "restoration" refers to the process of repairing or renovating old paintings to bring them back to their original condition. It involves careful and skilled work to preserve the artwork's integrity and historical value. Therefore, "restoration" is the most appropriate choice to complete the sentence, indicating the specific task being described.