I am researching on the colour of the Walrus aircraft abroad HMS Manchester in around 1942 and I found this photograph (link below) that the it was in a single light tone instead of the usual FAA camouflage scheme. Whether the mono colour was the pre-war aluminum, or light grey? Thank you.

https://picryl.com/media/the-king-visits-the-home-fleet-6-june-1942-on-board-ships-of-the-home-fleet-5cc719?zoom=true