Try to change image resampling in export settings from Detailed to Basic

Changing settings from Detailed to Basic doesn’t seem to work. Its a really puzzling problem. If you have anymore ideas let me know.

Here’s the link if anyone would like to try helping, it would be super appreciated.

I tried to export a png from your file and didn’t get any gray lines on the edges. 

I can see the gray lines in png images only in Present mode (it’s a pretty old visual bug), but not after file export.

Where did you get a screenshot of your first image?

Update your GPU driver!