Quote from Ted Carl at
this thread:
"You can really only
get what you can from the insides.
It will generally turn yellow, and a lot of it will wash right out. But there is still going to be some that gets left behind inside there. Especially since circulation is weak inside there during the bath.
I tend to believe that once you coat it down with rust preventative after it is loosened and turned into the yellow powder, and most of it is washed out, the rust preventative should keep it from being able to re-bond, and is far better than just letting it go as it was.
On the other hand, rust never sleeps (someone said that once, lol) . So nobody is ever going to totally stop corrosion on the insides of a frame, unless it is stopped at the production of the bicycle during manufacturing. Even if you painted the insides of the tubing right out of the mill, as soon as it got welded, corrosion would have already started in there. Rustproofing a brand new frame would still not keep it pristine inside there. The day it's manufactured, rust has started in there.
Get as much as you possibly can out of there. Rust proof it as soon as it comes out of the bath. Then quit getting it wet and dirty inside there (even low humidity helps a lot) (feeding the rust). And that is about all you can really do, and that will make it last many, many years longer than it would have otherwise.
Even if you have something re-plated, the (much stronger) acid they use in the stripping and in the chroming process, will have lots of rust forming on the insides before you even get it home.
Don't worry about neutralizing it. Rinsing it good, and coating it, will stop any leftover reaction right away.
Other than cutting a hundred old frames in half, and bisecting all the tubing, and experimenting with it for years and years, and subjecting it to every different rust proofing, and testing all the results, we will truly never know exactly how long the rust proofing lasts, how long it slows it down for, etc.... It's pretty safe to say that getting as much as possible, and coating it right up, is better than leaving it packed solid with rust, and leaving it to it's own devices to run free though.
Cheers.
"
So no neutralization?
And thanks for all of your input.. It's good to hear opinions.