Ah, I see. I will have to look up on that o:

But, don't worry, I am leaving the bike to be 100% converted back if it needs to. Well.. 90%... The fork is not original, I have the original, but it's got a bent steerer

After looking up rust killers, apparently oxalic acid isn't very effective, but I did find this. It's supposed to work decently well, but it's also 23 dollars a gallon. I suppose I could funnel it through the bottom bracket and seal off the vent holes.