Muslin is by far the best for acrylic murals - it is strong and thin which makes it somewhat easier to hang.For oil murals you will need linnen (since oils "eat cotton") you can get thin "Belgum Linnen" in Pearl Paint.
summizing - you need thin material fore easier hanging.
here is also link to the Murals on Canvas Article:
http://www.truefresco.com/dcforum/DCForumID47/1.html
learn fresco at http://FrescoSchool.org
fresco painting video tutorials: http://www.FrescoSchool.com
also visit
Fresco School Video Channel
http://youtube.com/FrescoSchool
Contemporary Fresco Gazette
http://trueFresco.Org
commission fresco or mural http://iLAdesigns.com
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