The production of fine filaments of the normal ‘atomised’ particles when some solutions of certain classes of high polymers are sprayed.  It may be reduced to a minimum, and often virtually eliminated, by careful selection of solvents and proper adjustment of spraying conditions.  Although cobwebbing is generally considered a defect in ordinary lacquers, use is made of this property to provide a protective coating for equipment such as aeroplane engines.  A cocoon is formed around the article by the pronounced cobwebbing action of lacquers specially prepared from certain high polymers.  A durable, true film-forming lacquer is then sprayed over the cocoon which acts as a support.