I have a 2003 20' Baja Outlaw. On the bench seat there appears to be mold underneath the fabric. The discolor is only happening on the yellow part of the fabric. The white fabric has none. It appears to be subsurface. I have tried cleaning it with Marykate Spray Away, recommended by a boat shop, with no help. Underneath the bench seat there is a storage area. After ever time out I raise the bench seat up and keep the motor hatch up to allow airflow and prevent mildew and mold. I am at a loss for what is going on.
I am attaching some photos. Thank you for your help.