Rust in the battery box

[Westy]

Here's what I've found underneath my battery. I've hit it hard with baking soda and water mixture, and i've vacuumed out most of the residue. What else can I do? How about the discs in the battery tray? Can I punch them out and clean up underneath? I still plan on spraying the whole area with Rustoleum super rust inhibitor, but I'm worried about this getting to the pan.

[azasadny]

I had the same thing and cleaned, then covered it with POR-15.

[Westy]

Yeah, but it's my understanding that POR only stops thew rust that it comes in contact with. What about underneath the plate?? I want to stop this so my pan doesn't disintegrate.

[azasadny]

Yep, you're right. Mine didn't go all the way through the metal. You need to "debride" away all of the bad metal and be sure you can cover all metal with the POR-15.