Hi again Salty, Re: the sprockets, I agree with grumpy, the front sprocket needs replacing, you may like to check the upper one on the cutter clutch shaft as usually if the cutter sprocket is worn both should be replaced as well as the chain.
All parts are available from the OutdoorKing online store, if they are not listed; send Bruce a PM and he will source them for you.
Re: Septone...I do know some colours are no longer available....try Bunnings, they have a range of hammer finishes or maybe try an automotive paint supplier or Supercheap Auto.
Auto One may be able to help you as well. Unfortunately the original Scotty hammertone formula has gone into the ether....
Thanks for your kind comments on the videos...I am glad they may be of help.
