Q. What is a good permanent hair color that is both non damaging to the hair and gives the maximum gray coverage? I find myself coloring my hair every two months.

A. Thank you for your interest.  Well, every two months is about right. You may want to use a colored crayon or brush in between color applications.  You can purchase these items from the beauty supply store.  They even come as a comb through product - which is a good way to cover up small areas. This will also help if you are concerned about over processing your hair with too many color applications.  Look for brands that have as less peroxide as possible.  The higher the peroxide levels the greater chance of damage to the hair.