I am about to attempt using your horn tutorial, and as you advised, I will use the whole can in one go. In your tutorial you mentioned that if you start carving the foam and leave it alone for a few hours, it will shrink and distort. So my question is, is it safe to store the lumps before carving? Or would they distort as well? Since I only need two lumps, I thought this why I can have some extra lumps on hand in case my first attempt doesn't pan out or the horns have an accident during wear.