My inlaws gave us wedding cake steps and they had been using pool chemicals, etc. Anyway, the hand rail is aluminum and about 18" of it, the portion that was in the pool, has calcium buildup inside and out. Outside is no big deal, wire brush, sandpaper, then Rustoleum.
The inside is a little tougher to get. the rail is about 1.5" opening, so I can get a small wire brush in there, but only so far. Is there a chemical way to remove these deposits?