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  •  » Interior floor pan rust treatment

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    4/08/2021 5:17 PM  #1

    mustang6518
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    Registered: 2/15/2021
    Posts: 31

    Interior floor pan rust treatment

    Any suggestions for interior floor rust treatment? Pictures here from after an intial wire brushing to knock the loose rust off. Now planning to use Master Series Metal Prep, then Master Series Silver. Is the MS AG111 top coat really needed?

    Rear drivers side floor pan has some small holes (included close-up), but all other rust currently present doesn't seem to be terrible. New front floor pans were welded in at one point. 

    After I get this treated and cleaned up, planning to layer on some Dynamat Xtreme and then possibly Dynaliner for thermal shielding (unfortunately currently no working AC). 

    Last edited by mustang6518 (4/09/2021 6:06 PM)

     

    4/08/2021 5:43 PM  #2

    Ron68
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    From: Mukilteo, Washington
    Registered: 4/01/2013
    Posts: 1,578

    Re: Interior floor pan rust treatment

    BILLY WALTON -  I'll bet you can answer this person's question! You have extensive experience with this....

    68 coupe - 351W, 4R70W, 9" 3.25 -- 65 convertible - 289 4v, C4, 8" 3.00
     

    4/08/2021 6:01 PM  #3

    rpm
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    From: Bakersfield, Ca
    Registered: 9/17/2013
    Posts: 3,660

    Re: Interior floor pan rust treatment

    I've used a wire wheel on a 4 and a half inch grinder with good results.

    Bob. 69 Mach 1, 393W, SMOD Toploader, Armstrong  steering, factory AC.
     

    4/09/2021 5:50 AM  #4

    TKOPerformance
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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,499

    Re: Interior floor pan rust treatment

    Evaporust will work fine.  The various rust converters like POR15 require a rusty surface to work, so if you were going that route I would advise getting rid of the loose rust, but leaving the stuff that's still attached.  Evaporust will convert any rust present, even the stuff that's down in the pits, etc. 

    A wire wheel works well.  Twisted wire wheels are more aggressive if needed.

    After that, a good quality primer and paint before any insulation, etc. is applied. 

     

    4/09/2021 1:18 PM  #5

    mustang6518
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    Registered: 2/15/2021
    Posts: 31

    Re: Interior floor pan rust treatment

    Was thinking of going Master Series Metal Prep, then Master Series Silver. Is there any need to also do the Master Series AG111 top coat? Or would I be fine with just the 2 layers of MS Silver?

    Last edited by mustang6518 (4/09/2021 6:02 PM)

       •Thread Starter
     

    4/09/2021 3:23 PM  #6

    TKOPerformance
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    From: Newark, DE
    Registered: 12/15/2014
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    Re: Interior floor pan rust treatment

    Since its not exposed to UV light I'd think it would be fine without a topcoat.  I wouldn't bother with Evaporust before using the Master Series.  My guess would be that without some rust to convert you won't get a good bond.  Let the Metal Prep handle the rust conversion and act as a tie coat between the metal and the Silver coat. 

     

    4/09/2021 4:01 PM  #7

    6sally6
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    From: Surfside Beach,SC
    Registered: 4/02/2013
    Posts: 6,853

    Re: Interior floor pan rust treatment

    Many-many moons ago I........squirted some spray on undercoat on mine..........let it dry......applied a layer of roof underlayment......new carpet..........period.

    I guess if I was gonna leave the windows down....and park it outside....rain or shine...then I would worry about  "encapsulating-the-rust or converting-the-rust" or whatever.
      I knew I was gonna park it inside(when possible) and not drive it during rain storms (when possible) and they don't salt the roads here and I wasn't planning to drive it on muddy roads everyday.
    The two sheet metal patches I pop riveted in place then...are still there. Simple.
    I knew I was not gonna sell it so I would be the last owner.
    The biggest rust 'thang' I did was........repaired the leaking cowl that allowed the rusty floor in the beginning!
    6sally6

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

    4/09/2021 6:02 PM  #8

    mustang6518
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    Re: Interior floor pan rust treatment

    TKOPerformance wrote:

    Since its not exposed to UV light I'd think it would be fine without a topcoat.  I wouldn't bother with Evaporust before using the Master Series.  My guess would be that without some rust to convert you won't get a good bond.  Let the Metal Prep handle the rust conversion and act as a tie coat between the metal and the Silver coat. 

    Got it. Any recommendations on seam sealer or can I go with just about anything? 

       •Thread Starter
     

    4/09/2021 6:12 PM  #9

    BILLY WALTON from GEORGIA
    Carrollton, GA Bash Host

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    From: CARROLLTON GEORGIA
    Registered: 4/14/2013
    Posts: 2,431

    Re: Interior floor pan rust treatment

    I USED POR-15 GOOD STUFF

    Its really me....I fixed my caps lock .
     

    4/09/2021 9:51 PM  #10

    rpm
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    From: Bakersfield, Ca
    Registered: 9/17/2013
    Posts: 3,660

    Re: Interior floor pan rust treatment

    Eastwood has a brush-on seam sealer that I've been happy with.

    Bob. 69 Mach 1, 393W, SMOD Toploader, Armstrong  steering, factory AC.
     

    4/10/2021 5:52 AM  #11

    TKOPerformance
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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,499

    Re: Interior floor pan rust treatment

    The last couple times I've needed it I've used the polyurethane stuff from NAPA.  Comes in a tube for a caulk gun then you can back brush it with an acid brush dipped in lacquer thinner.  Looks factory. 

     

    4/11/2021 3:46 PM  #12

    BobE
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    From: White Plains, NY
    Registered: 4/04/2013
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    Re: Interior floor pan rust treatment

    Bearing Bob wrote:

    Eastwood has a brush-on seam sealer that I've been happy with.

    I also used Eastwood's brush-on seam-sealer and am also happy with the results.

    65 Fastback, 351W, 5-speed, 4 wheel discs, 9" rear,  R&C Front End.
     

    4/11/2021 5:35 PM  #13

    HudginJ3
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    From: Cedar Hill, TX
    Registered: 4/29/2015
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    Re: Interior floor pan rust treatment

      Most rust converters are water based. Because of that it will not stop the rust from coming back, or continuing. You do need to paint it when you are finished cleaning it up with a water proof paint. I would use the paint (top coat) the manufacture of the converter says to use. 

    70, ragtop 351W/416 stroker Edel Performer heads w pro flow 4, Comp roller 35-421-8. T5
     

     

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