If you have an ultralight aircraft there is a good chance that it is covered with dacron sail cloth. This is the same style of cloth used in the sailing industry. These boats are generally quite expensive, with the owners wanting bright colours and CLEAN sails! So to find out how to clean dacron sail cloth I searched the "sail boat" web and came up with the following recommendations which i follow in san blas sailing
CLEANING - Use a soft scrub brush and a mild detergent or Ivory soap. Detergents with a neutral ph factor will not tend to set certain types of soil rather than remove them. Always scrub in line with seams. After scrubbing, rinse sail with plenty of warm water to remove all soap before laying flat to dry.
MILDEW - Mildew is caused by storing soiled sails wet. While it does not affect the strength of Dacron, it is unsightly and should be removed early to prevent spreading through the dirt and moisture left in the sail- a good reason for keeping the sail clean.
--
san blas--