radmanly,

I treated my doors with Rust Bullet two weeks ago and just installed the weather stripping last Friday. I totally removed my trim since I want the Rust Bullet to fully cure, so I know what you mean. If you notice that side of the weather stripping that goes toward the outside of the channel has square edge and the side that goes toward the door has ridges. What I did to install the weather stripping was place the square edge in the channel so it would lock against the outer edge of the channel and then roll the weather stripping in to place toward the door. I also used a Popsicle stick to help seat the weather stripping against the door. To do both doors took about 30 minutes.