I bought a pair of shoe polish from Alden 2 years ago that is specifically for Color 8 cordovan. I always take it in when I have my shoes done. The cobbler told me it has gone bad and is turning black. Looks OK to me, but he forgets more about shoes every day than I will ever learn. Should I buy new polish? Not a big deal for $8, but still something i had never heard of before because I thought polish lasted forever.