Hello Blender community! I am new to 3d modeling and this strange error happened to my mesh and I am unsure of how to fix it…
recalculating normals did not fix it so Im not quite sure of what is wrong.
In this order
Check your materials are correct
Remove double vertices (W / remove doubles)
Remove faces inside your mesh
Recalculate normals (Ctrl+N)
Flip selected normals (W / flip normals)
Supply an example blend file for review
Thanks for your time, the problem fixed itself once I closed all openings on my mesh and recalculated normals after. 