Dont panic, i have a brand new brown leather sofa and my daughter got bright red nail varnish on it. I search the internet for help, with no luck, everyone says nail varnish remover...DO NOT USE THIS, nor do you have to spend a fortune on cleaning products of specialists. I sat thinking for a while and came up with the idea of sticky tape! i tried it and it removed everything after a few attemps, leaving no mark at all!
GOOD LUCK! xxx