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Thread: 1979 some pretty bad rust cancer spots...best fix?

  1. #1
    Join Date
    Feb 2012
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    Question 1979 some pretty bad rust cancer spots...best fix?

    I have a 1979 Pontiac Fire-bird Trans Am V8 403 6.6 motor. The previous owner must have let it get dinged up pretty bad and now it my time to fix-er-up. Im restoring this with my dad(who is a mechanic and has been his whole life) but we dont know much about body repair. How should we sand up the rusted dings and the cancerous sections at corners of doors and such...there is also a 12 inch whole about the exact same shape as a ruler on the back fender...should we cut it out and wield on a new sheet of metal? Also we are working outside because we need to keep our garage free for our actual work on other cars and this is a long project, is it alright to sand it down to bare-metal outside or will the bare-metal just rust over too? thanks ---Nick IMG_3988.jpgIMG_1885.jpgIMG_7383.jpg

  2. #2
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    On areas that are rusted through creating a hole you should cut away the bad metal and patch it using new metal but areas of surface rust can be cleaned, primed and repainted. Below is a link to a door repair but most patching is done in a similar manor.

  3. #3
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    Quote Originally Posted by Len View Post
    On areas that are rusted through creating a hole you should cut away the bad metal and patch it using new metal but areas of surface rust can be cleaned, primed and repainted. Below is a link to a door repair but most patching is done in a similar manor.
    thanks for replying! how about that corner that isnt rusted through a hole but just really bad surface rust cant replace the metal because its in the corner and has a trim, will sanding and grinding her down work? also after u wield a new piece of metal in and sand/grind down the beads of wield what kind of puddy do u use? and what grits should i use and when do i grind and when do i sand when do i use wet sand and when dry? thank u sooooooo much

  4. #4
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    Quote Originally Posted by nlovallo96 View Post
    thanks for replying! how about that corner that isnt rusted through a hole but just really bad surface rust cant replace the metal because its in the corner and has a trim, will sanding and grinding her down work? also after u wield a new piece of metal in and sand/grind down the beads of wield what kind of puddy do u use? and what grits should i use and when do i grind and when do i sand when do i use wet sand and when dry? thank u sooooooo much
    For rusted and pitted metal we would normally blast the metal clean or apply Picklex 20 to stabilize the surface then apply standard body filler to level the surface then prime and paint.

    After welding in a patch we use a milled fiberglass filler to seal the seam then a standard body filler to finish leveling the surface.

  5. #5
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    Quote Originally Posted by Len View Post
    For rusted and pitted metal we would normally blast the metal clean or apply Picklex 20 to stabilize the surface then apply standard body filler to level the surface then prime and paint.

    After welding in a patch we use a milled fiberglass filler to seal the seam then a standard body filler to finish leveling the surface.
    Thanks man, what do u recommend for body filler? bondo?

  6. #6
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    Quote Originally Posted by nlovallo96 View Post
    Thanks man, what do u recommend for body filler? bondo?
    For high quality work we use Rage Gold and for quick and cheap work we use Dyna-Lite The Dyna-lite is harder to work with but on the cheaper work we don't work it as fully as we do on high-end work.

  7. #7
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    I found that autobodymasters has a filler similar to the rage gold for less money... not quite as lite as the Rage but sands decently enough...I used the Quantum for fisnish work

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