• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-

Rust on Window Belt

  • Thread starter Thread starter DuluthFoxbody
  • Start date Start date Wednesday at 8:36 AM
D

DuluthFoxbody

Member
Oct 14, 2026
9
8
13
Duluth, GA
Wednesday at 8:36 AM
#1
  • Wednesday at 8:36 AM
  • #1
Not sure if it's called the belt or trim, but there is rust (hopefully only scale or surface rust) along these areas of the window. Looks like there might be a bit where that black quarter window trim starts too.

I understand it depends on the extent of the rust, but in terms of repair do you think this is a job for wire wheel or brush to remove the rust, sand, and then prime or paint? Or maybe use some rust converter or rust encapsulator and then paint? I remember reading these pieces have rivets holding them in, so if necessary maybe drill the rivets, remove, repair, and then reinstall? I have seen the different trim pieces that go under and around the windows, but not new versions of these.

Any best practices on how to approach this?

 

KRUISR

10 Year Member
Apr 16, 2015
1,879
1,023
143
Wednesday at 8:48 AM
#2
  • Wednesday at 8:48 AM
  • #2
Looks typical of sun damaged trim. My son's car was similar. Pic below shows some of the damaged trim paint (look around the door).



I just sanded to smooth out the surface, no primer. I think I finished with 320 grit and then painted with satin trim paint.



I then installed new window run channel (not shown in the pics).

The trim at the bottom of the window is easily removed - a screw in rear door jam, then slide the trim rearward 1/2-1" and lift off. Then sand and repaint off the car - or replace with new.

If outer door belt moulding is worn (window seal along the bottom of glass) there is 3 or 4 rivets to drill out to remove. New replacements are available. If the upper rubber/felt edge is stiff, its time to replace - this piece seals water out of the door cavity along the lower edge of the glass.

Upper door frame and run channel frame are refinished on the car. The run channel weatherstripping (yours looks shot) can be left in for painting or removed, your choice. Only remove if replacing. There are no fasteners holding it in, just friction into the run channel. Mine are removed in the finished pics. When painting these you will want to mask off the rest of the car.



The upper door trim (above the door, attached to the pillar and roof). This can be removed. There is a screw near the side mirror on the A pillar and the trim is held to the roof pinch weld with three clips - similar the the windshield and back glass trims. Mine was filled with butyl for the rear 2/3 of the trim (same stuff that seals the quarter windows).



(pics I took so I could remember where the clips went). In the last two pics you can see the butyl.
 
Last edited: Wednesday at 11:07 AM
Reactions: General karthief, rednotch, DuluthFoxbody and 1 other person
D

DuluthFoxbody

Member
Oct 14, 2026
9
8
13
Duluth, GA
Wednesday at 9:43 AM
#3
  • Wednesday at 9:43 AM
  • #3
Wow, that looks great! Thanks very much for the detailed reply; this helps a lot.

Was there a particular reason to not use a primer, or these just don't really need it?
 

KRUISR

10 Year Member
Apr 16, 2015
1,879
1,023
143
Wednesday at 9:51 AM
#4
  • Wednesday at 9:51 AM
  • #4
After I sanded, it was smooth enough for the paint. I didn't want to bother with the extra step.

Priming would then need to be resanded back to a 320 or 400 grit.
 
Reactions: General karthief and DuluthFoxbody

rednotch

I'd like to remain having one chocolate starfish
Founding Member
Aug 14, 2000
1,506
710
143
south jersey
Wednesday at 11:06 AM
#5
  • Wednesday at 11:06 AM
  • #5
Mini da, 1-3" Scotch pads and a can of trim coat, can knock that out in an hour two for both, done that many times, since most that lived out side look like that now most do need new run channel liners, and the mirrors done at the same time though but if your only cleaning up the rusty look, trim coat and sanding it is fine. The Sem trim coat holds up very well direct to metal or over primer.
 
Reactions: DuluthFoxbody
D

DuluthFoxbody

Member
Oct 14, 2026
9
8
13
Duluth, GA
Wednesday at 3:32 PM
#6
  • Wednesday at 3:32 PM
  • #6
rednotch said:
Mini da, 1-3" Scotch pads and a can of trim coat, can knock that out in an hour two for both, done that many times, since most that lived out side look like that now most do need new run channel liners, and the mirrors done at the same time though but if your only cleaning up the rusty look, trim coat and sanding it is fine. The Sem trim coat holds up very well direct to metal or over primer.
Click to expand...
Thank you! Definitely reassuring to hear.
 
You must log in or register to reply here.

Similar threads

B
Where to go from here on my build…
  • B0udreaux
  • Jul 14, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
8
Views
411
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jul 18, 2026
AeroCoupe
87 LX 'Vert
  • fun331
  • Jun 15, 2023
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
27
Views
4K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Oct 30, 2024
Mustang5L5
SOLD 1993 Mustang Cobra / 114K miles / Modified / Fort Lauderdale, Florida.
  • Naja
  • Oct 4, 2023
  • Fox Body Mustangs For Sale (1979-93)
Replies
5
Views
12K
Fox Body Mustangs For Sale (1979-93) Feb 26, 2025
Naja
Took some pics, i do really own a mustang...
  • 2000xp8
  • Jun 20, 2023
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 6 7 8
Replies
148
Views
20K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Oct 1, 2024
Mustang5L5
J
What is this?
  • James408
  • Jun 19, 2020
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
8
Views
1K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jun 19, 2020
James408
J
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?