I am tearing up an old sun room and noticed that the wiring is the old style, it looks aluminum probably 50+ years old. It looks to be in good shape but I would like to replace what I can. I believe that I will be able to trace it to a junction point where I can replace the wiring from the junction to the outlets. Once I do the remodel in the other room I will then try to replace that wire all the way back to the breaker. My question is can I attach new copper wire with the old stuff? Since the wall is open now it is the best time to change out the section of wiring I am just not sure if this would cause any issues. I appreciate any help you can provide.