Rear Door Jam Rusted Through

[EJ's XD]

I attacked what I thought was some surface rust in booth my rear door jams only to find that both sides had rusted through to the wheel wells. Once I started grinding I was alarmed to find how wide spread it was. Any good recommendations to 1. Stoppping the spread and 2. Buillding back up the gaping holes.
EJ

 

[DiscoJen]

Generally, the only way to keep the rust from spreading is to completely remove the affected areas and welding in new metal. There are ways to "slow" rust a bit by grinding away as much as possible and using a good phosophoric based neutralizer, and repainting with a quality epoxy or military ordnance primer...but it will come back through with time unless removed altogether.

And integrity is also a concern since the rusted area is now a weak spot...shoving bondo in there won't reinforce the damaged area so again, welding in new metal is the best way to go.

Wish there was better news to give - but rust is our enemy.

Jen