Yes, soapy water should do the trick as well.
I have to have the glass completely removed by the auto glass guys before repairing the rust. I'm buying new rubber strips (old ones are a bit hard in places) and I'll get the auto glass company to first clip the rubber strips and the chrome trim onto the edge of the glass before bonding it to the body - so it all goes back together with the glass. It looks like this is what the factory did. Hopefully they won't break the glass when taking it out!
