Once more, these methods are for minor, bothersome marks in your phone. For those who have significant scratches and cracks on the screen, you're going to need to Visit the pros or absolutely substitute the screen by yourself. Grinding Polishing Machine Scratch Removal 1, Two types for polishing machine , https://iphone-polisher75285.sharebyblog.com/34477951/the-basic-principles-of-screen-scratch-polishing-machine