I tried Marc Carder's method like 7 years ago, and for some reason i give a break on my "art journey".
I want to try oil painting seriously now. And i have discovered that i have some "purified linseed oil", "venetian turpentine" and "stand oil" in my hand. I cant see any expiration date on their bottle, do they have? Is it ok to use them after 7 years?