A Component Shop Lead Mechanic reports about an unserviceable radome that was removed from their company B747-400 for severe paint erosion; a missing latch and excessive moisture contamination had been loaned to a foreign carrier prior to being repaired.

Narrative

An unserviceable radome that was removed from aircraft 'X'; a B747-400; for a deferred item was delivered to our Component Repair shop. The radome had severe paint erosion; a missing latch and evidence of moisture contamination. The radome was removed from the container and placed in the unserviceable area outside of the Repair Shop. The unserviceable [FAA] 8130 Tag paperwork along with the recoverable tag and Repair Center record card was submitted to a Maintenance Planner to process the radome overhaul Job Card package.Upon arriving at work the next day; the radome was not in the shop. I found out second hand that the radome was scuff sanded and partial painted by the swing shift Painter and given to someone late that night. I assumed it was sent back to the [same] B747. [Approximately one week later]; I e-mailed my manager; my day shift supervisor and the swing shift supervisor as to where the unserviceable radome went? I had an unserviceable 8130 [Tag] that reported that a serviceable radome was installed on aircraft 'X' [four days prior to receiving the unserviceable radome in the Repair Shop]. I have yet to receive an answer to my e-mail.