No i never tried scotch guarding denim before but I've heard of people doing it to their jeans and jackets. I will test it in a small hidden area but I do not see a problem occurring to be honest. It's fabric, it's denim (not silk or a delicate fabric) so I personally think it will be fine. I will read reviews first. Usually i stay away from uncoated canvas (fabric) but I cant resist this denim Cosmetic GM. I love adding my own twist and designs to bags so being able to "create" my own bag with this GM will be so fun!

oh wait! I forgot! I did scotch guard my LV "denim" loop. I totally forgot about that bag! No issues at all with that bag. It is a different type of denim though. More like the luxe denim in stretchy jeans. The Cosmetic GM denim is more like true denim.