HELP,, cowl rust questions??

[KAILUAZ]

So my "free" 86 LX has the cowl about rusted out (what a wonder fix by the P.O.). This is going to be a race car and not a daily driver. There is no A/C and the heater hoses are not connected.
I am thinking I can just use POR15 in there to stop the rust from spreading and make a cover to seal off the area. I do need the wipers as I'm in Florida so it needs to be removable.
My questions are:
1. Since I'm in Florida the windows tend to fog up. If I seal this area off is there another way to get some air for the defroster? Can I just pull the outside air inlet duct off and use air from inside the car?
2. Does anyone sell a delete plate for that area?
Here are the pics:
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[1991vert]

only way to get rid of it is the sandblast it or cut & weld.

did a wild animal crawl in there and take a dump?

 

[KAILUAZ]

only way to get rid of it is the sandblast it or cut & weld.

did a wild animal crawl in there and take a dump?

Haaaaaaaaaaaa yeah thats what I thought also,, you have to love how people fix things!

 

[KAILUAZ]

No one else has had rust here?

 

[KAILUAZ]

Well my fears were right, the whole cowl is rusted out:
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[TomCat]

I had surface rust down there, just a little though. That bites man, cut and weld is all that's left now

 

[KAILUAZ]

Here is the passenger side and center section,, yikes the whole thing is almost gone!!
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[Mr. Rustypwnz]

thats not too bad, go find you a donor car, cut, weld, and BAM!!! its like new again.