reconditioner
/ˌriːkənˈdɪʃ(ə)nə/ /ˌriːkənˈdɪʃ(ə)nə/noun
A person who or thing that reconditions something; specifically (in the timber trade) a humidifier for reconditioning warped or unevenly shrunk timber.
Origin
1920s; earliest use found in U.S. Patents. From recondition + -er.