Hello! I am using Blender to create a GFX with a Police Car in it. The only thing is there’s a Z-Fighting issue and I don’t know how to fix it. (I’m New To Blender Btw 
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(I’ve Tried Remove Doubles Even On The Highest Setting)
Would you be able to send the file so I could get a closer look?
It seems to not let me.
(There was an error sending the file
Have you tried using Eevee? That usually fixes the error.