i think tyre black can make bikes look tarted espically if your tyres are bald.....
i hate it when you go to look at a bike or see a bike on ebay with tyre black on because you think the tyres are new and there atually knackard.
Its also annoying when people wash there bike and then take the pics while its wet because everything looks shiny and you cant tell the real condition of the bike.
Just give in a very good clean cleaning every where you can see dirty..
give you silencer and any other alloy parts a dam good polish(like a mirror) with autosol (best metal polish)
clean you chain in a bowl of petrol and then go round the sprocket cleaning each tooth with a damp rag covered in petrol.
Polish all your plastics up. take off worn and tatty stickers and maybe put a few new ones on.
Just ones like dunlop or whatever on the swinging arm.
James