I have gone thru my dad's shirts, but some of the ones I want to use are a cotton/polyester combination. Can they still be used if I use a fusible or a muslim on them for the back? And can they be combined in the quilt top with some of the cotton ones I plan to use also? And would it be ok to use some of his flannel shirts for the back , is so would I put a batting in it then? I would like to use some of his camo jeans and overall pants for the back of one top I make with the shirts, but I wouldn't have to use a batting with it because it will be heavy correct? Thanks for the help. Myra