Re: Boat Cover Question
Sunbrella recomends 303 products (I think they are the best and are widely recomended). See link/instuctions below from link.
http://www.303products.com/tech/index.cfm?fuseaction=product.display&Product_ID=496
Procedure:
Before "retreating" or "protecting" a fabric, the fabric first must be thoroughly cleaned. Fabric protector products bond most effectively to a perfectly clean fiber. Anything not removed from the fiber interferes with the bonding and performance of the fabric protector product. All dirt, body oils, sweat, lotions, oils of any type, residuals including un-removed soap or detergent residue, impede bonding and performance.
A clean appearance alone is NOT sufficient. And if washing with water alone were sufficient, we wouldn't need detergent when washing our underwear, would we? An appropriate cleaning agent must be used. After washing, the fabric must be THOROUGHLY rinsed. To remove all suspended soils and cleaning agent residues, of course. Detergents are not easily rinsed off. As a general rule, wash thoroughly once, rinse thoroughly twice. Fabrics that require dry cleaning: The dry cleaning process leaves no residue. No additional prep is required.