Floor Pans- Rust prevention and Tunnel treatement, advice needed Options

[highways]

Hi all,

I'm working on my floor pans... I have them wire brushed down to bare metal. They are in overall decent shape though there is some rust around the perimeter where they meet the longitudinals. These corners seem innaccesable to all but a small wire brush (toothbrush size). Question is:

1. Should I apply POR 15 Surface Prep, then POR 15 to get in cracks, then Seam Sealer, then maybe another coat of POR 15 over Seam Sealer?

2. Or, should i just do Seam Sealer first over bare metal, partial rust areas around the perimeter? Then follow with POR 15?

Second question... the smaller 'cross tunnel'.. the one where the front seat adjustment bracket mounts, is in poor shape. Rust inside it looks bad... some of the lower edges are gone but it's still largely inaccesable to any tools or painting. I think my options are:

A. Drill some holes in top, blow it out, and spray as much paint in there as I can and call it a day.

B. Cut it out and weld in replacement. But is this part even available? And still how do you paint the bare metal inside after you've welded a new piece in?

Any advice would be appreciated.

[highways]

Thanks guys

[sixaddict]

I asked a noted porsche restoration guy about using POR 15...he basically ignored my question (which told me something) and told me to use either Benjamin moore iron clad or rustoleum damp proof primer...Neither will you find at home depot etc...But fastenall or BM store which may need to be ordered.

Personally I did ironclad, factory tar pads and then body color ...Specialist said do not use tar but I wanted sound proof. Figured with new seals the idea is to keep water out !

On cross member ...Auto Atlanta does carry that part as reproduction....

Good luck

Thanks guys