I'm slowly winning the rust battle. I'm doing a section at a time. Once the rust is dissolved, I'm left with deeply pitted steel. I've been painting that with Rustoleum "rusty metal primer" then aluminum paint. I think it's a little cheesy looking, but should keep the rust at bay.
I find it lurking everywhere!
While waiting for the rust to dissolve, I've been checking everything else including the tubes. Most were good, a few marginal and this nearly dead 6J6.
Shorts, leakage and nearly no emission.
I find it amazing that this set is functional with this RF oscillator/mixer tube installed in the tuner.
Of course it works even better with a good tube