diff --git a/io_scene_psk_psa/psk/builder.py b/io_scene_psk_psa/psk/builder.py
index 366410a..80b3fe4 100644
--- a/io_scene_psk_psa/psk/builder.py
+++ b/io_scene_psk_psa/psk/builder.py
@@ -58,11 +58,17 @@ def get_psk_input_objects(context) -> PskInputObjects:
     return input_objects
 
 
-def build_psk(context, options: PskBuildOptions) -> Psk:
-    input_objects = get_psk_input_objects(context)
+class PskBuildResult(object):
+    def __init__(self):
+        self.psk = None
+        self.warnings = []
 
+
+def build_psk(context, options: PskBuildOptions) -> PskBuildResult:
+    input_objects = get_psk_input_objects(context)
     armature_object: bpy.types.Object = input_objects.armature_object
 
+    result = PskBuildResult()
     psk = Psk()
     bones = []
 
@@ -168,6 +174,10 @@ def build_psk(context, options: PskBuildOptions) -> Psk:
             mesh_object = bpy.data.objects.new('', mesh_data)
             mesh_object.matrix_world = input_mesh_object.matrix_world
 
+            scale = (input_mesh_object.scale.x, input_mesh_object.scale.y, input_mesh_object.scale.z)
+            if any(map(lambda x: x < 0, scale)):
+                result.warnings.append(f'Mesh "{input_mesh_object.name}" has negative scaling which may result in inverted normals.')
+
             # Copy the vertex groups
             for vertex_group in input_mesh_object.vertex_groups:
                 mesh_object.vertex_groups.new(name=vertex_group.name)
@@ -278,4 +288,6 @@ def build_psk(context, options: PskBuildOptions) -> Psk:
             bpy.data.meshes.remove(mesh_data)
             del mesh_data
 
-    return psk
+    result.psk = psk
+
+    return result
diff --git a/io_scene_psk_psa/psk/export/operators.py b/io_scene_psk_psa/psk/export/operators.py
index d2ad36c..80e097f 100644
--- a/io_scene_psk_psa/psk/export/operators.py
+++ b/io_scene_psk_psa/psk/export/operators.py
@@ -163,12 +163,18 @@ class PSK_OT_export(Operator, ExportHelper):
         options.should_enforce_bone_name_restrictions = pg.should_enforce_bone_name_restrictions
 
         try:
-            psk = build_psk(context, options)
-            write_psk(psk, self.filepath)
-            self.report({'INFO'}, f'PSK export successful')
+            result = build_psk(context, options)
+            for warning in result.warnings:
+                self.report({'WARNING'}, warning)
+            write_psk(result.psk, self.filepath)
+            if len(result.warnings) > 0:
+                self.report({'WARNING'}, f'PSK export successful with {len(result.warnings)} warnings')
+            else:
+                self.report({'INFO'}, f'PSK export successful')
         except RuntimeError as e:
             self.report({'ERROR_INVALID_CONTEXT'}, str(e))
             return {'CANCELLED'}
+    
         return {'FINISHED'}