i bought a steel frame and had it built up into a pretty sweet bike last year. unfortunately, i was not savvy enough to get it treated with some sort of rust/corrosion prevention solution prior to the build up. i live a dry climate, so it's not bathed in humidity, but it is a mtn bike and splashes across a creek from time to time. and i have noticed a thin layer of rust in the seat tube.

does it make sense to go ahead and have it treated at this point, or have i missed the window?

how much disassembly would be required? i'm picturing simply pouring the solution down the seat tube and just turning the bike this way and that to slosh it around the frame, maybe with the wheels off. that simple?

thanks.