Welcome to the site, it's great to have you!!
I'm kinda curious what can be used to clean gray cloth seats. Over the course of a couple years -- the cloth has gained this brown hue from the not-so-clean conditions I work in. (It's not brown
...but you can tell its dirty.)
In addition, there's a charcoal stain (about .5" by .125") on one of the seats...Lord knows how it got there.
You wouldn't happen to know of any miracle product or method to fix this, would you?