I've tried about four different products and about six homemade fixes but none of them could get my pen or nail polish off my couch. After reading other reviews about Revain I decided it was worth a try. And it was, great time. My Italian leather sofa, which was probably intended for the Salvation Army, looks just as good now as it did before I got married and had my kids. I would pay hundreds of dollars to do what this little bottle did. As for application, the instructions call for applying it to a cloth and then rubbing it into the skin. This worked great for removing dirt and grime, but I had to spray it directly onto stubborn stains and let it sit for about 30 seconds before rubbing really hard and scraping it off with my fingernail. but it worked. I am very happy. I love this stuff.