How to remove plastic sheet on side mirror

A bit Pai Seh to ask this question. But I realise both my side mirrors got wordings that read something like that :" Objects appear on the mirror appear to be bigger than actual size". I thought it's some clear plastic sticker covering the mirror to protect it when they deliver car. But I just can't find any flap for me to remove the sticker. My question is, is the wordings engraved on the mirror? If it's just plastic sheet, how to remove it?

Its not plastic sticker. The wordings are permanently embossed on the mirror.

It's just a gentle reminder from KIA to change lane safely. So nice of them hor. hahaha.

Ha... OIC... I thought it's some plastic sticker and I keep scratching and only to leave a lot of finger marks.