I wanted to use a solid chambray coloured fabric for my quilt back. I posted a picture of the marks left on my sample on another thread a while back. ( faint but noticeable) If it was solid colours in the piecing I don't think you would be able to notice it but with the large piece it would bother me. I did use the iron on my sample because I wanted to dry it so I could wash it. By the way, a hot iron kind of melts polyester batt. 
Luckily it was just my sample! Title was
Polyester Glue Experiment.
Last edited by Tartan; 05-15-2013 at 04:56 PM.