Sunbrella has a comprehensive stain removal guide that provides great advise on how to remove stains.
Limit Exposure to Direct Sunlight.
One of the best ways to keep outdoor fabrics looking good and to delay deep or vigorous cleanings is to properly maintain the fabrics. This can be accomplished by simply brushing off dirt before it becomes embedded in the fabrics, wiping up spills as soon as they occur or spot cleaning soon after stains occur. The following care instructions are recommended by Sunbrella and are a good guide for caring for your outdoor fabrics whether they are Sunbrella or our Factory Solution Dyed Acrylic Fabrics.
Our standard fabrics and (medium and hi density polyurethane) foam are best suited to outdoor undercover areas where the cushions may get some side spray from rain but will not be in direct rain. If cushions do get wet tilt them up on their sides to assist in drying. If the inner foam becomes soaked, remove the cushion cover and let the foam dry before putting cover back on.
If you want to leave your cushions out in the rain we recommend QuickDryFoam® foam inserts. QuickDryFoam® is exceptionally porous and permeable which allows maximum water drainage and air circulation, allowing quick use after being wet or even saturated. QuickDryFoam® uses UREGARD – in-bulit anti-microbial protection. It will prohibit the growth of common moulds and fungus inside your outdoor cushions even when left outdoors for a long period of time.
General or light cleaning:
Brush off any loose dirt.
Prepare a cleaning solution of (1/4 cup) mild soap per 4 litres of lukewarm water (less than 38°C).
Use a sponge or a soft bristle brush to clean.
Allow cleaning solution to soak into fabric.
Rinse thoroughly to remove all soap residue.
Allow fabric to air dry.
Spot cleaning:
Machine wash in cold water on a mild cycle (less than 38°C). Depending on wash load size, use normal amounts of mild laundry soap and add (1 cup) of bleach. Allow fabric to air dry.
Mildew may grow on dirt and other foreign substances that are not removed from the fabric. To clean mildew, or other stubborn stains:
Outdoor fabrics have a special finish that enhances water repellence. The finish is designed to last for several years of normal use, but may be refreshed after a thorough cleaning or extended use.There are many commercial Fabric guards available on the market (always test before use) and follow manufacturer’s instructions.
Apply a light mist of mild soap and water using a spray bottle.
Work the solution into the stain by lightly scrubbing the area with a sponge or soft bristle brush.
Rinse thoroughly to remove all soap residue.
Blot excess moisture with a clean, soft towel or sponge.
Wet-vacuum or blot excess water.
Air dry, Repeat steps 3 and 4 until all soap residue is removed.
Here are some helpful videos to show how you can remove some common stains.