Yes. If the brown-base 6sn7's test strong, you just paid for half of your restoration work. Black-base 6sn7's work exactly as well in your TV, the brown-base ones belong in the Audio threads...

Yes. Windex the rag, not the glass.

And have fun!

great; i was just about to go clean the 639T's glass with windex. thanks

Finished with the recap
 

Its slowly coming along. I finished re-capping the chassis tonight. Brought it up slow with the HO and damper out. If i turn up the volume I can hear hum, but nothing more.

The Bad:
The HO tube (6BG6) is dead, and I don't have a sub or replacement. So no raster yet.
The CRT is very week. It responded to rejuvenation, but is still only putting out 200ma emission.

The good:
The chassis didn't catch on fire

It was interesting replacing the main filter caps. I got terminal strips, surface mounted them to the chassis in an open area, then wired all the caps in. I swear there are some places in this set they just don't want you to get to.