Ive been wanting to say this for some time but havnt for fear that someone would take it the wrong way but here it goes, , Ive had frames with surface rust many times and all Ive done was to remove the rust with soap water and a rag, thats it, after treatment? keep it clean and dry after every ride. Thats it, no chemicals no super cleansers, now this would be different for deep rust but the rust on this bike isnt deep, so yeah, thats what Ive done for years and its worked out very well for me heres where the rust used to be on my Schwinn, most thought it to be a problem but as you can see its now just paint, primer, and blackened steel, no rust, treated as stated above, even ridden in the rain =) the missing paint doesnt bother me as the rest of the bike makes up for it