Garden sprayer with a solution of hot
water and a bit [1/2 c.] of bleach, and a scrub brush. Hose it off. Repeat if necessary. Be prepared for it to be clean, it may still look awful, but you can make chaps for it if you don't like the appearance...or have a set made. Such can be sewn on a normal
sewing machine, you do not need a
Sailrite for it.
Ann