I wash everything by hand except what we call unbleached calico. I think it is called muslin in America. I know the quilt snobs turn there noses up at the mention of it, but I make quilts to be used. Calico gets softer and whiter the more you wash it.
I will wash it up to 8 times before using it. Always have a stash of it so I don't run out.Buy 10 metres at a time.
I do use quilt shop quality fabric as well as fabric off eBay and any bargains I just happen to find.
As I give them away to charity as well as family & friends I figure I will use what I feel is right for the quilt.