Sorry for the length. I'd appreciate help.
I just finished a frame building course, and soaked the frame to get rid of some big hunks of flux, and the water was too hot. Now, there are little wisps of rust all over the down tube and bottom bracket.
It's coming off easily with 220 grit, but I'm worried about the inside tubing, where the tubes were prepped for brazing. I'll have it painted in a few weeks, they can probably take care of it, but I want to stop the tiny bit of rust now if I can.
I picked up some 'Krud Kutter - The Must For Rust' at the hardware store. (It was a choice between this and Naval Jelly, and since I'm trying to treat the insides of tubes I figured the more liquid, flowing stuff would work better.)
I'll sand off most of the outer rust, and then treat some place inconspicuous - i.e. the inside of a chainstay - to see how this stuff works. Then, get set up with a big bin and a big water bottle with some sort of thin nozzle, spray a bunch of the Krud Kutter into a tubes, wait a decent amount of time, then rinse the snot out of it with room temperature water - through the water bottle braze-ons / bottom bracket drain holes. Probably do one tube at a time.
Will this work?
Anyone have better advice? Thanks in advance.