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Undercoating dilemma

Discussion in 'Truck & Equipment Repair' started by 02powerstroke, Nov 8, 2009.

  1. 02powerstroke

    02powerstroke PlowSite.com Addict
    Messages: 1,188

    Ok so I'm installing a flatbed on my 250 and a lot of the undercoating on the frames still intack just coated in dust and theirs a bunch of rusty spots on the springs and frame where things bolted up or the undercoating wore away. Should I rust converter these spots and then re under coat the whole thing or what? I know I cant paint over the undercoating and the thought of removing it makes me want to shot my self so I'm alittle unsure what to do.

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  2. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

    The only way anything will last for a real long time is to sandblast the frame. I don't think you want to do that. I would rustoleum the bare/rusty spots, and cover the works in Fluid Film.
     
  3. 02powerstroke

    02powerstroke PlowSite.com Addict
    Messages: 1,188

    Idk what to do I want it to look nice because its all going to be hanging out in the open cause the new bed
     
  4. Clint S

    Clint S Senior Member
    Messages: 280

    You could POR 15 it and then undercoat over that or just POR 15 it. They say the stuff fades in direct sunlight, but I painted a few things around the farm and although it dulled up some it still looked fairly good.
     
  5. 02powerstroke

    02powerstroke PlowSite.com Addict
    Messages: 1,188

    I dont think it will stick to the undercoat. What do you guys think about using rust converter then more undercoat so its all the same? I can undercoat over rust can I? cause it will just rust undertone it ?
     
  6. secret_weapon

    secret_weapon Senior Member
    Messages: 437

    My recommendation is don't use the rubberized undercoating. It will dry, flake off and moisture will get under it and you won't see the rust holes. I like the idea of rust converter and then paint with rustoleum, but after that spay the s*** out of it with FF. If you can find the OE undercoating it will be a wax type and stay soft. Such as Rus-Fre(sp?) from a body shop paint supply.
     
  7. 02powerstroke

    02powerstroke PlowSite.com Addict
    Messages: 1,188

    Thats exactly what it is its like a greasy tar film it sucks to try to remove. I will try to find some oil based stuff tommrow
     
  8. 02powerstroke

    02powerstroke PlowSite.com Addict
    Messages: 1,188

    I found the stock style undercoating its an Asphalt based stuff. I bougt Napa 4514. Its not rubberized so I will see how it works out.
     
  9. FordFisherman

    FordFisherman PlowSite.com Addict
    from 06611
    Messages: 1,594

    I've had pretty good results with the POR 15 system. It comes with the marine clean and metal ready spray which neutralizes the rust before coating with the product. Requires a little patience but the results are worth it.
     
  10. 02powerstroke

    02powerstroke PlowSite.com Addict
    Messages: 1,188

    The axles and springs I did in black rustolem and I'm going to undercoat the bed onces its been installed.

    problem solved
     
  11. secret_weapon

    secret_weapon Senior Member
    Messages: 437

    sounds good! Then do a once or twice a year spray with Fluid Film or used motor oil to makes sure things stay coated. The asphalt coating is good, but will dry out and flake off if not sprayed with oil or FF. my .02:nod: I know this from my own experience.
     
  12. 02powerstroke

    02powerstroke PlowSite.com Addict
    Messages: 1,188

    that was my plan to use oil/grease and spray the whole underside bumper to bumper down when I'm finished.
     
  13. brad96z28

    brad96z28 PlowSite.com Addict
    Messages: 1,526

    I would just have used rust doctor on everything It would look nice and black and u would not have to worry about it again! I use it on all the plow frames I need another gallon to do my truck. .