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Door post and rust repair

  • Thread starter Thread starter Kleinjj27
  • Start date Start date Aug 21, 2026
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    rust repair
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Kleinjj27

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Dec 16, 2022
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Tampa florida
Aug 21, 2026
#1
  • Aug 21, 2026
  • #1
currently replacing door posts and lower cowl on my 93 fox. I fully separated the new doorpost via drilling all spot welds as i need to replace a portion of the passenger a pillar as mine has rusted and i didnt want to stitch weld around the entire a pillar. When separating the replacement post at the overlapping joints theres some pretty good hidden pitting i want to address before reassembling/installing not looking to do this job twice.

My question, im working with eastwood rust encapsulator plus that i plan scuff and apply to the undercarriage and cowl upper and lower and also the engine bay, those areas have minor surface rust and ive cleaned off nearly all the surface rust before applying. Would that be a suitable plan to apply in these overlap joints on the door posts? My only concern is obviously i cant weld through it nor would i want to and if i tape off all the spots for plug welds applying a weld thru primer over pitted rust probably wont last too long. Seems im going to have to cut out the rust and replace it with clean metal before i reassemble guess im just looking to hear thats what i gotta do
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
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polk county florida
Aug 21, 2026
#2
  • Aug 21, 2026
  • #2
Got any pics to see ?
 
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Kleinjj27

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Dec 16, 2022
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Tampa florida
Aug 21, 2026
#3
  • Aug 21, 2026
  • #3
 
K

Kleinjj27

Member
Dec 16, 2022
25
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Tampa florida
Aug 21, 2026
#4
  • Aug 21, 2026
  • #4
This is for passenger side for some reason is seems the passenger side gets it worse both on my car im repairing and the donors door posts. On the bright side driver side is a breeze to fix
 

KRUISR

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Apr 16, 2015
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#5
  • Aug 29, 2026
  • #5
I have used POR15 to coat the same areas you are looking at. Both on my son's 89GT and when I replaced the rockers on my F150.

On my F150 I fully coated the inner and repair rockers and then rosette welded through them. I did not notice any penetration issues. A little extra stinky smoke, but no functional issues that I have experienced.

 
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Kleinjj27

Member
Dec 16, 2022
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Tampa florida
Sep 3, 2026
#6
  • Sep 3, 2026
  • #6
KRUISR said:
I have used POR15 to coat the same areas you are looking at. Both on my son's 89GT and when I replaced the rockers on my F150.

On my F150 I fully coated the inner and repair rockers and then rosette welded through them. I did not notice any penetration issues. A little extra stinky smoke, but no functional issues that I have experienced.
Click to expand...
Oh perfect im glad to hear i ended up wire wheeling and lightly grinding down the metal shown in the photos and coated with eastwoods rust encapsulator ground down n sprayed weld thru primer on the spot weld areas im thinking about urethane seam sealing the over lap joints on the door posts in attempt to lock out the ability for moisture to get in smoothed down and painted over id highly doubt any eye would noticed other than my own once finished
 
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Kleinjj27

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Tampa florida
Sep 5, 2026
#7
  • Sep 5, 2026
  • #7
 
Reactions: General karthief, 2Blue2 and gkomo

KRUISR

10 Year Member
Apr 16, 2015
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#8
  • Sep 5, 2026
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WOW - that is one heck of a reconstruction and a lot of work.
 
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Kleinjj27

Member
Dec 16, 2022
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Tampa florida
Sep 8, 2026
#9
  • Sep 8, 2026
  • #9
KRUISR said:
WOW - that is one heck of a reconstruction and a lot of work.
Click to expand...
I appreciate it is absolutely was alot of work, 5 12 hours days to do the door post repairs and that was starting with the car gutted. Im big on doing it right one time. Figured id post these up so anyone looking into doorpost repairs knows what entails as i couldnt find anyone showing these photos. Got the lower cowl on almost back to lookin like a car.
 
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