All went well!
Followed your advice John and treated all area's with Prochem Fabric restorer as per instructions with brush to create foam.
I had to let dwell and re treat head marks several times, but have come out completely.
Arms and back panels were re cleaned with micro spliters twice till no further dirt evident on towelling off.
This was a 5 piece suite, 4 chairs and 1 sofa that took 7 hours in total inc breaks
Chairs were heavily marked on arms which came out completeley. One mark did not come out sofa cushion which looked like food dye.
Seems that Jute lining used on frame which did not cause a problem and cotton liner used on cushions. No horse hair problems luckily.
Some fading was understandibly already evident and water from waste tank was slightly green. Customer over the moon!