If you could pull out your existing side mirrors without cracking it, BlackMagic has a friend who can do the laser etching for you.

But if you don't want to take the risk of pulling it out, sand etching can be done without disassembling the mirrors. Luckily, I have shared the number of Mang Francis to some tsikoteers who have claimed of his etching service. +639193689377

Or another side mirror etching service is also offered to members of former Philippine Motorists Association... the current name just slipped of my mind.