I recommended a buy rating for UniFirst Corp. (NYSE: UNF ) when I wrote about it in July, as I believed it could continue to expand margin and that valuation should rerate upwards if UNF meetsI consider an investment ideal if it performs its core business in a sector projected to experience structural (organic) growth in excess of GDP growth over the next 5-10 years; profits from sustainable competitive advantages that translate into attractive unit economics; In the hands of competent, ethical, and long-te ...