Natio Nail Colour Kashi Polish your look with these quick-drying, long-lasting nail colours. Directions Start with a layer of Natio Top and Base Coat to protect nails and guard against staining. When dry, apply two thin layers of Nail Colour (rather than one thick layer), ensuring the first coat is completely dry before applying the second. This deepens the nail polish colour. Finish with Natio Top and Base Coat to seal and protect your polish. TIP: Reapply both Nail Colour and Top and Base Coat every three days for ongoing resilience and shine.