Had a couch, chair and foot stool cleaned in Port Orchard , Washington.Chair and stool's cloth coverings done well, but our older (in excellent condition) velveteen couch was ruined.
The original crew left tool marks over the whole couch and destroyed the pile, all exposed after the couch dried. Their fixall guy came in and spent several hours brushing it out but the damage was done. My advice is to take pictures to document condition of your furniture before they start. Though they all bragged of up to 15 years experience, they didn't know how to deal with this material and insisted that I couldn't address the problem because I had no experience in the field.
Fortunately for them we aren't the suing type.Good luck.