Actually I was wondering something similar about one of mine - is T Cut a bad idea on bike frames?!
I've used it a few times with no ill-effects. I've also found that turtle wax works well for keeping things hydrophobic. You could always test the inside of a chainstay if you're concerned.
@ffm started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Actually I was wondering something similar about one of mine - is T Cut a bad idea on bike frames?!