Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
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Since it's inside the frame, there's nothing to be gained by removing the rust. Use some of the framesaver on the brush or a rag and remove whatever's loose and comes off, then spray to coat and seal what's left.
Using water, with a bit of borax or baking soda to manage PH would be OK if you had a warm place to dry it. Usually I suggest a car parked in sunlight as a solar oven, but I think it's now too cold out for that to work where you live. If you want to do the water wash, dry it either with a hair drier, or put it near your home heating plant for a while.
BTW- As others have said, be very careful about using some of the commercial rust removers. many of these first reverse the rust, but then if not completely removed, or neutralized continue reacting with the steel causing new problems. Steel frame tube walls aren't that thick so there's not that much steel to give up to chemical reactions.
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