Nails Inc. base coat is perfect for ridged and unequal nails as it will create an incredibly smooth surface area. The ridge filling base coat is appropriate for all nail types. Use one coat of Harley Street base coat on natural bare nails for a silky smooth surface. This product is perfect for toe nails which have the tendency to ridge easily. Plus, you can apply Harley Street base coat to the 'grow out' area between infills on any kind of nail extension to disguise the noticeable 'action' before applying colour.