Following Phill's superb suggestion to use a paint can for RFI shielding, I bought two - one from Amazon and one from Home Hardware.
Unfortunately, both of them have a gray film lining the can and the lid. The film completely isolates the lid from the can and prevents any RFI shielding.
The film is tough but thin. It can be scraped off, but this will be a very tedious job and not certain of removing every last scrap of film around the lid.
Can anyone think of a better way?
Thanks,
Mike