Whilst the US stars were added to Commonwealth vehicles in Korea for ID purposes, I'd suggest the scheme would be the standard British Army Bronze Green rather than one of the US Army's Olive Drab/Greens. In addition, the vehicles had British registrations and the like which were different to the US vehicles.
On the subject though, it's always a case of US stars being added to a Commonwealth vehicle or aircraft for ID purposes. One rarely, if ever, hears of British markings being added to US aircraft for the same purpose.
Regards,
John