The above two pictures are examples of a Corte*Cleaned® TREX® deck where a flower pot or other items have blocked the sun from evenly weathering/bleaching/fading the composites.
The image below is of a Fiberon® deck that had a fireproof barbecue mat on it that blocked the sun from evenly weathering the composites (look close).
Fiberon® deck – Weathering Issue- BBQ Mat
Before picture of mold, green lichen or moss under barbecue mat. Same deck as above picture.
This is an example of a weathered TimberTech® deck that has been thoroughly Corte Cleaned. See the square un-weathered area where furniture blocked the sun from evenly weathering this composite? Notice the area of this photo, on the left, that is wet with water.