How to remove rust in a crunchy place?

Hello together! While I was slowly slaughtering my old car accident, I also wanted to exchange the ugly peeled-off roof strips for the still intact of my old Volvo’s. When I had now removed the roof ring and everything in both cars, the usual picture: Lots of dirt underneath. So brush and water snatched and washed out everything. The surprise was great: Among them in my black 850 in the opposite places bad rust nests lurked. Also around the front window I found in some places. The story with the front window is still harmless. I can do that in the course of the anyway front window change. The rust nests between roof plate and side parts cause me more worry. How can I get rid of this permanently? Which rust converter can you recommend? I wanted to do the thing with a wire brush and the flex completely blank, several times prime, paint car body glue over it and then the whole gutter under the reeling with as tough carousy wax. Better ideas?