A spray apparatus is disclosed which is capable of producing a sharp-edged layer of coating in overlap over the surfaces coated in a different color so as to provide a distinctly divided two-tone pattern of wide dimensions without using masking tape. The spray apparatus comprises a first spray means...http://www.google.com.au/patents/US4527507?utm_source=gb-gplus-sharePatent US4527507 - Spray apparatus for applying a sharp-edged pattern of coating
