I came across a fantastic blog prepared by Kirsten Corleone focusing on how you can tint and edit mesh clothing. Clearly explained with a video link this is a fantastic resource. https://www.youtube.com/watch?v=SF-ijyzkpUU
Or you can see the post on her blog : http://kirstentacular.blogspot.co.nz/2014/10/tutorial-modern-rigged-mesh-fashionista.html .
Thanks Kirsten this is very useful information.