I thought I would practice machine quilting since all I have done so far has been by hand. Pieced together some potholders and I bought insulated fabric to put inside. The woman at the shop told me to put it in between two pieces of batting or it wouldn't work. I did that and basted it all together. The needle felt as if I was really pushing to get it through. The insulated piece looks like it has a shiny, almost metallic side. My question is, if I am having a hard time pushing a hand needle through, what type of machine needle should I use? The sandwich also looks kind of thick. I did use the lowest loft batting I had. Did I do this right? Any suggestions would help. Thanks.