Love that Mary Ellen's stuff, but boy is it pricey! Maybe one of our board members can direct us to a do-it-yourself version. The rust collecting on the can bugs me too. I use starch for my table linens and I always have to rinse and scrub the top of the spray can before I use it. What a pain.
I'd like to try liquid starch and make my own. But does it go bad? The Sta-Flo liquid starch is inexpensive.