OK, Here is a little known fact. I used to work at a Dry cleaners and I learned a thing or two. One of them is....
Never wear a blouse/sweater/shirt out to dinner and then hang it back up in the closet. Moths do not eat wool/silk etc. What is eaten are minute' food particles left over from the meal you ate. The moths lay eggs on the garmet and when they hatch the larva eat the particles of food and unfortunately the threads they are attached to. Cedar smells good, moth balls smell bad. Guess what? Moths can't smell. Well actually that's not quite true. They can if you smell like another moth...LOL
I prefer sizing to starch, just a personal thing for me. I doubt that your quilts would get eaten by moths if you use starch on the fabric. I'm thinking that if they did, our grandmothers and mothers quilts would be in tiny pieces by now. This is just my opinion you understand. Oh and the other thing.... Don't eat when your piecing/quilting. But if you do, wash the quilt when you finish it and you shouldn't have any problems with Moths.
:XD: