Cleaned a white vicose/linen flat weave suite very similar with water marks and stains all over. Rubbish to clean, method I used was to try everything twice and scrub like mad...solvex, solvall, spitfire, HD, Ultra pac, Rx spotter, sodium meta...not great results but they have had me back for the last two xmas cleans, sweated like mad each time. They said it was a good job compared to the dry cleans they had previous.
Also cleaned a viscose suite recently with a decent pile, left it fury but they were happy.
Explain what can and can't be done and how it will be left with each method, price accordingly and let them decide, there won't be many.