[Blender ---> Unity] Unity screws up my model textures on its materials

Help please, I have no clue what's going on! I export my model from Blender as an .fbx and import it to Unity, then I use Location: External Materials for importing materials to it, and when I do that, the models textures appears all messed up, like on every piece of clothes is a texture that shouldn't even be there, the textures are placed correctly on Materials when I checked yet still model is a mess, can somebody explain me please how to fix that? p.s: When I tried to export the model without joining all mesh together it looked fine in Unity :/
Edit: I've found a solution --> u have to put your model in the Unity scene then click on Body in Hierarchy then in Inspector in Skinned Mesh Renderer click on the Materials tab and you'll have to replace all the Elements there with correct materials. Hope this helps other nubs like myself xD