General:
Special products such as copper and zinc napthenate are used for the preservation on canvas. Oils, bitumens and waxes are used for impregnation and waterproofing. All these materials posses the necessary flexibility to withstand constant folding and unfolding. Paints as a rule do not posses the required flexibility, but on the odd occasion some form of painting may be required, e.g. awnings, sails, canoes, etc.
Preparation:
Remove gross contamination.