Originally Posted by
wrk101
+1 Watch out for sweat. I have bought several vintage steel bikes that were used on trainers, and the top tubes tend to have rust from sweat. I've also seen rust around the bb from sweat as well.
They make sweat guards, that should help.
+1 - you'll see the one on my Nishiki in my photo above. I've also used rags/towels but the sweat guard is nice because it's suspended over the top tube and not resting on it.