Will Apple still fix staingate for free on my MacBook?

No, Apple’s free repair program for staingate has ended for most machines. If your MacBook Air or Pro (2015–2017) is older than four years from purchase, you’ll pay out of pocket. Your options are replacing the screen (expensive), living with it, or trying a DIY coating removal with a Lysol wipe or Magic Eraser — which can strip the coating evenly but leaves a matte finish.