Clearing out the shed I found a very old bottle of polish/restorer. Used it to replace the tired, dull, dirty, porous wing tops with lovely clean shiny waterproof ones. Used it up on the wing sides, doors, front and rear sides. Now need to see if I've got another bottle somewhere which will polish the rear, and put a second layer on the sides. It's amazing what a difference half an hour in the cold winter sun can make. It's like having a new Landy! Let's see if it's also fixed the worn synchromesh!! 
