Frame Rust Prevention

["Michael T." <carrera@frontiernet.net>]

Well, I've got a clean, straight frame sitting on the floor awaiting its
body.
There is, however, some surface rust on the inside of the boxed sections I
can't get to. I could probably put it together and it would be fine for 20
years. But where would you get a clean Triumph frame in 2018? If I can rust
proof it now, I'd like to.

Is the a commonly used procedure to remedy this condition?
Acid dipping? Coating in oil?

Any info would be appreciated.

Thanks,

Mike
'74 TR6
'68 TR250 CC96