Gas tank mounting questions and rust control in rocker boxes

[SIMI BOB]

Took my gas tank out of my '69S this weekend and found the front mounting hole in this condition. Doesn't seem that this hole should be raised like this. Does anyone have a pic of what it should look like? Or just tell me it should be flat to the surrounding area. I am including a few other pics of the front bulkhead. I think this car was hit slightly in the front at one time, but there doesn't seem to be much damage other than a few sloppy welds in each front corner.
Also, there is a little bit of rust (this car has been in my garage for almost 50 years, so very little rust compared to some cars I have seen) in some areas. Do I treat this area with the POR products or something else. Also would like to put some product through some of the available holes (gas tank mounting holes, battery hold down holes) that will expand into the concealed areas around the tank, and also add something into the rocker boxes through some small drilled holes. This car shows no rust in the rocker box areas, but I would like to treat those concealed areas. I read about a product that will creep along the metal after applied, but can't remember it's name. Any help will be appreciated.
Bob B

[mac73s]

Have you looked underneath the car where this raised section is to see if a misplaced jack did the damage? I say damage, because unless the 1969 tank mounting surround is different than the 70, 72, and 73 I've restored, it is not correct. Also, it would raise the tank at this high point and the seal between the tank and surface would not do its sealing job.

[Phil Planck]

Only pic I have of my 69. Im guessing flat.

[moito]

yes the area should be flat..no big deal getting it back--the sloppy welds look factory to me..i do not see anything that would worry me to much..maybe the wiring could need a bit of refinement

[dho]

Bob, with respect to the interior voids, they should be treated with cavity wax. The aerosol cans come with a long wand for hard to reach areas. Greasy Fingers on YouTube has a good video on the process.

Regards,
Dho

[rgupta250]

Bob, the product that Dho is referring to is made by 3M.

https://www.3m.com/3M/en_US/collisio...vity-wax-plus/

Best,
Ravi

[SIMI BOB]

Thanks for the replies. Cavity wax ordered.
Bob B