The carbs, upon being opened, show a full fur coat on the 'ceiling' of the float chamber ( ie, underside of the carb body ). I've looked in Carb FAQ's , but it's mostly about cleaning jets etc.,.....this is on my 'new' k8 'project' bike....of course for 'project' actually read ' needs- everything- done- to- it!....Anyone find a good solution for removing this oxidation ?