In a medium bowl, combine sugar and lemon zest. Work the sugar with a wooden spoon or your fingers until combined and the sugar is very fragrant. Add the almond oil, jojoba oil, melted coconut oil, lemon juice, and peppermint oil. Stir very well to combine. You can add more sugar or oil until desired consistency is reached. Spoon into a tightly sealed jar and store in a cool place. Scrub will keep over a month.