Some clients shy away from nail art and bright colors on their fingernails, so as not to get a disapproving memo from their bosses on Monday morning. But what about when those clients are celebrating a special occasion — like a birthday or anniversary — and would love to wear something more eye-catching, just for a night or two? Offer them a manicure that does double-duty, a look that can transition from day-to-night with a simple at-home adjustment. Here are a few to try:  
> Apply a polished nail art design over a colored gel or gel-polish base. One to try: a CND Colour over CND Shellac (shown). At-home adjustment: The client uses polish remover to wipe away the polished nail art, leaving behind the Shellac.
> Apply a nail coating over a colored gel or gel polish. One to try:Minx Nails. At-home adjustment: Removal varies by brand, but for Minx the client uses a heat source (like a blow dryer) to remove the coating, leaving the solid color underneath.
> Apply brightly colored polish over a layer of clear or nude-colored gel or long-lasting base coat. One to try: Tammy Taylor Miracle Manicure Base Coat. At-home adjustment: The client uses polish remover to wipe away the bright polish, revealing the shiny natural-looking coat underneath.
> Polish the client in a subdued polish shade, then retail her a bottle of crackle polish. One to try: China Glaze Crackle Glaze Platinum Pieces. At-home adjustment: On Friday night before the client leaves for her night out, she simply applies the crackle polish to instantly punk out her look. She can then remove the regular polish and the crackle on Sunday night to go au naturale during her work week.