Does coloring the back of a cracked iPhone affect the phone in any way?

I've had my white iPhone 4s for about a year and a half now, and i recently dropped it and shattered the glass on the back of the phone. I've seen many people color the back with markers then wipe it off, so the color is only in the cracks. Does this harm the phone in any way?

No, not as long as you don't get the phone wet. The little liquid that sharpie lets out couldn't hurt it at all!

Anyway you can't hide the cracks unless you change the cover after-all that's a white phone.

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