Im a Carol Doak follower and one thing I heard from her years ago and now know it to be true is that paper does not ruin blades. The paper may leave residue and can be wiped off occasionally, but does not dull blades. I use my Gingher rotary blade and have yet to change it out after over a year of fabric and paper cutting. The reason I always kept my good scissors away from the family was because they wanted them to cut things other than paper i.e. Wire, wood, rocks, etc.