If you'd like to come up to Pittsburgh, I'm teaching a free upholstery cleaning class on Friday, April 3rd
The morning will cover some of the stuff you learned in the certification class (I teach those too), but instead of covering all of the different fibers and styles, I just focus on the problem fabrics, and what you need to do to clean them safely and effectively.
Then you'll have a chance for hands on cleaning after lunch time for as long as you want to stick around. I have bleeders, raw cotton, silk, and microfiber cushions to clean.
This free class is usually just for customers, but if you want to join us, let me know and I'll get you an invitation.
There will be no pressure for you to buy anything there, or even to become a customer.