Nail Repair Solution Thickening And Brightening Nails Removing Gray Nail Repair Nourishing Nail Care SolutionOur nail repair solution contains glycerin, panthenol and PCA sodium. It can repair nails and protect against bacteria. Its use is simple: Step 1, thoroughly clean and dry the infected toes and fingers. Step 2, use a nail file to gently file the thick end of the fungal nail until it is flat or thin. Step 3 Apply a thin layer of liquid to the affected area with a nail brush. Step 4 Apply a thin layer of liquid to the affected area with a nail brush.