There are many names to confuse the beginner the most common being French polish its self, it gets called Button polish, Best button polish, Dark polish, White polish, Outside polish, Red, Black, and so on. All you need to be concerned with is that your polish has a Shellac base, there are on the market synthetic polishes, these do not possess the same hard durability. Try to obtain Best Button Polish this gives a pleasant golden colour, and a hard finish when dry.
To apply the polish you will need to make a devise called a ‘Rubber’. This is made from Wadding (not surgical, that compacts down too hard) and a piece of lint free cloth, about the size of a handkerchief. Also needed will be an airtight container, a large Jam jar will be fine, this will be needed to keep the Rubber damp once it has been charged with polish. Linseed oil, raw linseed. not boiled. Methylated Spirit. Fine sandpaper, known as Flour paper, (not always easy to find) and some old rags.