This isn't what you're referring to, but might be useful.
A mildly abrasive cleaner that restores paint sounds like T-Cut, but I guess you know that.
EDIT Just checked the Insta link and it's a green Cannondale: I win?
It's exactly that! I thought it was JamesNQ who'd posted it. Tucked away in a very random thread as well...
I have it saved as a reference.
@fizzy.bleach started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
This isn't what you're referring to, but might be useful.
A mildly abrasive cleaner that restores paint sounds like T-Cut, but I guess you know that.
EDIT Just checked the Insta link and it's a green Cannondale: I win?