Drip rails?

I have been cleaning out the old sealant in the drip rails and have lots of surface rust. Im cleaning as best as I can, but I dont think I can get it all shiny. What do you guys think about this plan... Im wanting the paint the recess of the drip rail with POR15 and then you sealer over that. Is this a solid plan or just waste of time?

BTW, what did Mopar use in the drip rail. Near the outer edge is like bondo and everything else is like silicone. The silicone is easy to remove, but that hard stuff is a fight.