Create a beautiful French smile line with ease. The NSI Secrets Removable Brush On White Gel is a creamy bright white that can be easily brushed onto the nail. The Secrets Removable Brush On White Gel is perfect for creating smile lines or dazzling nail art designs. - NSI presents the latest in nail gel technology, the Secrets Removable Gel System. Secrets Removable Gels capture the same ease and workability as acrylics without the set time. You can take your time applying the product onto the nail as it only hardens when cured.