How do I make my frame water tight? I am trying to remove the rust from inside my steel frame. There are, however, a few small holes in various places along the frame. Any tips on how I can make these water tight so that I can fill it with vaporust and leave it overnight?
Don't make your frame water tight. That will only make your problem worse.

It's unfortunate to see a frame go bad due to internal rust, but it needs to remain unsealed.

The reason for this is that moisture will find its way in and needs a way out. Even if you never ride in the rain, condensation of water vapor alone will allow liquid water to accumulate inside the frame.

Most frames (I believe) have small drain holes near the bottom bracket for this reason alone.

Here's a nice little post from Gunnar about why their frames have drain holes:
http://gunnarbikes.com/site/2012/06/draining-your-bike/