Marble fabric is a contact print so the acrylic paint sits on the surface of the cloth. The fabric is colorfast and holds up well. If the fabric is rubbed a great deal through use than the colors can fade. I recommend my pieces be hung to avoid this problem.
Wall quilts only need to be cleaned every 4 or 5 years depending on location. Gentle shaking and gently vacuuming with a soft brush to remove dust is all that is needed during this time. The more a quilt is washed, the quicker it will age. On the other hand don’t be afraid to clean your piece. Dirt is damaging if left on a quilt over a long period of time.
Bed quilts need to be cleaned more often if used especially with pets around (my cats loved my quilts). If you fold the quilt back at night then it will not need to be cleaned as often.

The quilt needs to be cleaned first before storage. After cleaning roll the quilt, if possible and wrap in an old sheet. If you must fold the quilt then every four months refold along different areas to avoid creasing the quilt. Old sheets and pillowcases are ideal for storage. You can wrap the quilt in an old sheet and place it in a cardboard box. Quilts need to breathe so never use plastic and try to store in a cool dry place. Never store your quilt in the attic or basement unless climate controlled.