Kevin
70% viscose and 30% cotton means you have 100% cellulosic fibres. Think of the viscose as being paper (it typically comes from wood pulp). When it's wet, it's very week and easily damaged. In a perfect world this fabric would be dry cleaned. It's not a perfect world
It is VERY easy to abrade the viscose away, especially in contact areas, if the viscose forms the "hairy" part of the chenille, so be very careful with towelling. If this happens, a casual inspection by the customer would appear as though the fabric may have changed colour

It hasn't, it's just the chenille that has been abraded leaving a different colour yarn showing through. This will also happen with wear and tear, but soil build up usually hides it.
I would normally clean this fabric with the red (01) CFR jet.
As you have raised this issue, I would ask if you have attended any upholstery cleaning training courses?
Safe and happy cleaning

Ken