Holes in the rear wheel wells

[Smith5316]

I have developed rust holes in the inner wheel well of my 07 expedition and am looking for tips to fix them. Water is getting in the rockers and causing rust

 

[BigOleFordFan]

Well the best way it to cut (or have somebody do it) the rusted metal out, grind down the surrounding areas, & patch/weld/rivet in some stainless (or galvanized) steel sections, prime & paint with undercoating material over the entire area....

I am facing a similar issue, and have an appointment next week with a company called "Rust Repair Inc" to see what its gonna take to fix my rocker panels....

Hopefully it won't be too bad, but I am crossing my fingers