If you are worried about heavy use and staining on slipcovered pieces, we typically do not recommend adding a chemical spray to protect the fabric, instead, try one of our fantastic performance fabrics with stain repellent and stain resistant properties are 'built-into' the fabric itself as opposed to a chemical spray that has a funny smell, requires reapplying and takes a long time to dry. We offer Sunbrella, Crypton, Inside Out and Breathe fabrics in our slipcovered lines. These performance fabrics are very different that yesteryear's polyester-blends. They are soft, luxurious and machine washable!