Holts Cataloy Knifing Putty is a durable and easy-to-use bodywork surface filler that provides a quick solution to chips and deep scratches. It fills in surface imperfections to create a perfectly smooth finish, ready for painting. Use the applicator provided to apply to deep scratches and chips for an even finish that's easy to paint on. Suitable for all car finishes, it can be used on bare metal, primer, or with body filler paste. This 100g tube fills surface scratches and stone chips, giving an extra smooth finish prior to painting.