So I'm told you cannot texture and object in Blender and then upload the textured object into Second Life. My work flow is Object > Unwrap > UV Map to Photoshop for Textures > Assign UV Map to Object > Export to Collada,selecting SL/OpenSim Static > Upload to SL. Of course, the textures do not follow. Am I missing a step? If you can't upload a textured object, what is the use of the Operator Preset? The other related issue is that when I upload an object to SL, in edit, I cannot select an individual face to apply a texture to. It applies the texture to the entire object, regardless of selecting "Select Face." I have mapped, not mapped, mapped each individual face, textured, untextured. It always applies an texture to the entire object.
Yes you can't is the simple answer. You have to upload your textures and apply them in world. As for selecting faces, in Blender you need to assign a "material" to the parts you want to call a "face" in Second Life. If I can attach a photo you will see an object created in Blender, material slots applied (Black,red, green, yellow, blue) and, each of those are faces 0-5 on the object in SL.