Streaky tan lines? Strike one. Two days spent in prewax purgatory? Strike two. Sweaty, smudged mascara? Wait. Before you strike out this summer, take a time-out at LuxLash. Forget the sticky strips you’ve stuck to your lids in the past. The new beauty boutique in Beverly Hills deals in only natural-looking, waterproof, semipermanent extensions, which bond individually to your real fringe. Get a 60-lash enhancement, a full set of 120, or go all out with the fluttery 150-plus Bad Boy treatment. In need of full-service maintenance? Get a mani/pedi and brow shaping while you lash out. The extensions last for two months and fall off at a realistic rate one by one. So you’ll have plenty of time for batting practice. LuxLash, 9640a South Santa Monica Boulevard, between North Bedford and North Camden Drives, Beverly Hills (310 273-5274 or luxlash.com).