Issue with Multiple Skeletal Meshes having Lines in material

I have a character that is comprised of multiple Skeletal Meshes. This is so I can interchange parts for a modular character as well as have a dismemberment feature. However, the process that I have done, has a rendering issue where the meshes come together. I believe its a rendering issue because if its a solid mesh, this doesn’t happen. My question is how can I have a multiple skeletal mesh character without this issue?

bump please