There’s nothing I love more than a relaxing evening in front of the TV painting my nails. But the likelihood of waking up with smooth, glossy nails that haven’t been ruined by a night’s sleep is less than minuscule, so the idea of a gel-based maincure has always appealed. Three weeks of chip-free nails that are as glossy as the day they were ‘done’…what’s not to like? But there’s the…