I took a class from Carol Doak several years ago and she really is a wealth of information. I recently took her class on Craftsy and if I remember correctly she said that paper would not dull your scissors. I have always used the little quarter seam ruler, I think it's add a quarter with a lip that goes against the folded paper, then you us your rotary cutter to cut long the ruler getting an exact 1/4". It works.