I Googled them and found the original instructions from Magnaverde -

"Forget all that nonsense about teensy bottles of expensive paint medium from the crafts store. You don't need anything more than regular latex semi-gloss paint--and a lot of guts. I found a beautiful Baker Chippendale camelback sofa, with cool curved arms and a fat down cushion, but it was covereed in a hideous glazed chintz in the ugliest colors I ever saw. I found some great yellow wool damask to reupholster with, but it would have cost me $3OOO just for the fabric and trim, so I painted my sofa instead.
Everyone freaked out when I told then the plan, but it worked. I was planning on painting my living room dark green, so I decided to go with red leather. First, I painted the whole thing with bubblegum pink semigloss latex paint, using the widest foam brush I could find, and brushing it on in long strokes front-to-back and up + down.
Think of that as the primer coat.

I let it dry 2 days, and sanded it super lightly with fine-grade sandpaper to get rid of the burrs--and there were a lot of them. When I couldn't feel any more sharp things, another coat of paint, spread thin. Dried and sanded again. Then spread--with my hands--a thin coat of raspberry red semi-gloss paint I had deadened a little with brown to make it a little less vivid. Because it was a deep color, there wasn't much white filler in the paint, so it was almost like a glaze or stain, instead of paint, which is just what I wanted anyway. I just smoothed it on, like suntan oil, and worked it into the pink paint. I let it build a little thicker at the back, on the inside of the arms and at the back edge of the loose cushion, so that the paler, thinner red took on an air of wear at the high points.

I let it dry 2 days, then CAREFULLY sanded the few new sharp things, and touched up those spots with my fingers. I let it dry 2 days, then waxed the whole thing with regular paste wax. After it was dry, I polished with a soft cloth, then dusted with talcum, and vacuumed it all off. It was a little stiff the first few days, but now it not only looks like red leather, it feels like it.

This worked great on my ugly glazed chintz, and probably would work on any smooth fabric, except that some may have more burrs and therefore require more sanding, but I wouldn't try it on anything with a heavy texture. And no, the paint doesn't peel off. And no, it's not stiff, either. Think about it--it's latex paint, and essentially, that's what's in those little bottles of fabric medium."

And I just found this recent post with some photos. Link is below.

Here is a link that might be useful: Painted chairs completed

I like Jacquard Textile for natural and synthetic fabrics. If done properly your fabric feels like fabric when you are done. Do practice on some scrap fabric to get the hang of it first.

Now why didn't I think of Google? I remembered GottaBE's post but I don't want a leather look. DD has an attachment to her carpet cleaner so may take one with us on our next visit and see if the amber colored stains can be removed. Chairs don't appear to have soil on arms or seats, just amber colored spills, too many to ignore.