After cutting away the badly rusted outer vent covers, the inside also has rust. And some rust-through spots. I'll be patching the rust through spots obviously... I'd appreciate advice/insight on one thing, though...

Should I return to the sandblaster to remove the rust and then repair, or should I seal the rust as is? This won't be a show car, it's to be a daily driver.

http://i.imgur.com/4DTx2Vi.jpg
http://i.imgur.com/hljLNoy.jpg