Twincoat This allows a sub layer before the varnish and a top coat to add shine to semi permanent polish. Do not forget to prepare the nail before applying it (pushing the cuticles, sand the top of the nail with a white block, apply a primer to facilitate the adhesion of the varnish -> I put it only on the tip of the nail varnish or there would tend to flake). In the application, no need to put much. Priority should be given thin layers. Once the final layer done, degrease with Nail cleaner. The polymerization in the LED lamp is very fast and is perfect for holding a few weeks, only the regrowth of the nail is missing!