Kamei Covara Duolift roof box (East Acton W3)

Only opens from left hand side and needs a clean. There is a broken part as shown in the photo but it doesn't affect function.
Full spec here - make sure it will fit your car!
https://www.roofbox.co.uk/gal/rbx/KAMEI_Corvara_DuoLift_Jul_07.pdf
Need gone this weekend so will prioritise fastest collection.