So im trying to export this slice to unreal and when I do it glitches out and i can only see the opposite side to what im facing. i think this may have to do with when i tried painting on the mesh it would be very difficult and barely work and paint the other side mostly. And at the same time its not exporting my materials/colored thing for it which might just be a mistake for me or something.
Any help greatly needed
This is more related to normal direction of the mesh faces. You need to make sure that the face normal of the mesh are facing outside.
Make sure there are no red color on the mesh. If you see one like the image below, that means your normal direction is wrong. You will need to flip it before you import into unreal.
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ok thanks you’re correct, thats the problem. So how do I flip it then?
in edit mode, select all and press “Shift+N” 
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Thanks