Old Remedy
My granny use to use White Vinegar, I still do. BUT! It really depends on the Textile/Fabric and any Chemical Applications that have been applied to it. Lets say I use to own a Sail, I put certain UV Protectants on it, then I put some Water Repellant chems on it, well I just 'sealed' the Textile/Cloth. For stains I normally take em out back, run em up a Flag pole in my backyard, stretch out the foot, and start cleaning with Soap and Water. If is a stain that is stubborn, I use White Vinegar on it. Normally works, sometimes it doesn't. But is still good Sail Care.
