I found grandpa's 14' long cane fishing pole. It is in 3 sections with aluminum sockets to connect the sections. Aluminum on both the pocket end and the extension which goes inside the pocket. The bottom section was separate from the middle section, but the tip and middle section were together. They are not cooperating with separating. I'm guessing they were put away wet, and after years some aluminum oxidation has happened, making the aluminum rough and locking it together.
So, what to do?
I thought of a penetrating oil like kroil or WD-40, but I've never tried it on aluminum.
What do you think? Any other suggestions?