Originally Posted by
kahn
After a day of backpacking in the Sierra, my t-shirt would dry and stand on its own - Salt Starch. I have since moved to point/shoots and they are carried in a full case. Next bike was a carbon fiber and then a custom titanium - no rust on those!
Even though sweat won't damage carbon fiber, it will damage the paint. My sweaty ride buddy ruined the top tube paint job on his Trek. Twice.
Nowadays, I wipe down my frame with some dilute ammonia in water after every hot ride.