i have a client who bought a suite 12mty ago.Navy blue,cotton loose covers,the type that can be removed & placed in washing machine?

.The fabric has faded a noticable amount in the main body contact areas & fronts of the chairs & settee. Also staining from juice etc from her babies.the suite was protected by a major local furniture retailer,using a product from leather master (stainsafe)
Is there a independent person/company who can test the fabric to see if there has been a protector applied to the items.
the fabric has never been fully cleaned by customer or professional,only spot cleaned
Thanks
Lee G