Well I have got my mower working with the hour or two a week I have had, it now runs almost as good as new! I started it up today on the second pull after a week of sitting in the shed. The only trouble I seem to be having is getting it to tick over slow enough not to engage the centrifugal clutch, and to have it running slowly enough to turn the blades whilst the clutch lever is pulled up and locked in place. Also, my starting mechanism is not working, so I am using the tried and tested method of the end of my brush handle and a length of string wrapped around the cup the pull start locks into. The blades seem to be a little stiff too as they don't turn when the mower is at low revs until I release the clutch handle, until then the belt stays still whilst the pulley turns. Any help will be greatly appreciated!
Oh, and after much consideration, I've decided to not respray the mower and have removed the matt black paint, for anyone who read my last post.