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  1. #1
    Join Date
    May 2010
    Posts
    1

    Unhappy Paint exterior bare metal door

    I stripped my exterior metal door down to bare metal and need to know how to finish the door (what type of paint, primer?) I applied a rust inhibitor already. I tried rust oleum paint for exterior doors with no primer and it was the most difficult job I ever tried to do. The paint was like rubber, tried too fast and left streaks and grey spots all over. Please help my door looks like a prison cell door. Thanks, Pat

  2. #2
    Join Date
    Aug 2007
    Location
    Portland, Oregon, formerly of Chicago
    Posts
    1,584

    Default Re: Paint exterior bare metal door

    squirrelmender,

    Did you strip the door because of heavy paint build-up,or because it had peeled to bare metal. If it peeled to bare metal, you should "pickle" the metal with acid so that the paint can grab the surface better.

    I am not sure that you should have used used the RustOleum Rust Inhibitor. This is a coating that is intended for exposed metal such as shovel blades. I am not sure how it will affect the adhesion of your finish coat.

    If I were finishing the bare door, I would simply use a spray can of automotive primer. It will give good adhesion to metal with minimal build-up of paint. If you can find the proper color, spray cans will give a nice brush free finish. Being an oil finish, they also avoid the stickiness which latex paints often exhibit, especially a nuisance where the weatherstripping contacts the painted surface.

    If brushing, you can use either latex or oil over the primer. The biggest advantage to the latex is that it is much more fade resistant than oil.

    The ultimate finish would be a sprayed on automotive fihish. Of course, this requires decent spray equipment.

  3. #3
    Join Date
    Apr 2011
    Location
    Adelaide, South Australia
    Posts
    17

    Default Re: Paint exterior bare metal door

    I had a similar problem recently. My local hardware store had paint specifically for metal surfaces - it was latex. They told me that latex expands and contracts better than oil and so would last longer.

    I'd suggest you have a conversation with your local paint spe******t and get a paint specifically formulated for external metal. In my case, it was Dulux paint and the finish looks good.

    Good luck
    Last edited by allretainingwalls; 04-18-2011 at 08:47 AM. Reason: fixing a typo

  4. #4
    Join Date
    Dec 2010
    Location
    Houston Texas
    Posts
    2,363

    Default Re: Paint exterior bare metal door

    Treat that metal door as though it were a car and you'll get excellent results. But that may be a bit extreme for some.

    Painting a door is best laid flat, out of the sun.

    When the color is OK, we prefer to use the appliance paint in spray cans. It takes about 4 hours to dry but gives a very durable surface. Commonly sold at home burrito in white and beige.

  5. #5
    Join Date
    Jun 2010
    Posts
    40

    Default Re: Paint exterior bare metal door

    i would have never used rust-o-lem i tried there direct to metal in a bar that i maintain peeled of in weeks they wouldn't back there product i'll try anything once (this was there new productthat they gave contractor disc) i use b/moore direct to metal waterborne dries under 45 min & use a candle on the edges to keep door from sticking until it is fully cured about 30 days

  6. #6
    Join Date
    Jul 2010
    Posts
    62

    Default Re: Paint exterior bare metal door

    If you use a rust-inhibitive primer you should be able to use an ordinary exterior paint. I think you probably had problems because of your lack of primer. Primer will help the paint go on smoother and prevent rust.

  7. #7
    Join Date
    Jun 2011
    Posts
    208

    Default Re: Paint exterior bare metal door

    I would use anyone's exterior alkyd primer and then top coat with anyone's exterior alkyd paint.

    I would use Penetrol to thin both the primer and top coat to help reduce brush marks.

    And, I would paint with a FLAT top coat so that the door is already rough and ready for another coat of paint in the future when it comes time to paint again. Painting with a flat alkyd paint now will avoid having to scuff sand a glossier paint down in the future when the door needs to be repainted.

  8. #8
    Join Date
    Aug 2007
    Location
    Portland, Oregon, formerly of Chicago
    Posts
    1,584

    Default Re: Paint exterior bare metal door

    To each his own, but I would never use a flat paint on an entrance door. It will show every little scuff mark and will be more difficult to wash than a higher sheen.

    Regular alkyd paints will oxidize severely. I would opt for automative paints for the optimum, long lasting finish with minimal oxidation and maintenance. Properly applied, it will last for years, short of outright damage. I

  9. #9
    Join Date
    Sep 2008
    Location
    Fargo, ND
    Posts
    137

    Default Re: Paint exterior bare metal door

    Nestor,

    I'm a little shocked to hear ya advocate a FLAT on an exterior door!
    You couldn't PAY me enough to use it!!

    I'm not even a fan of Flats INDOORS!

    Faron

  10. #10
    Join Date
    Jun 2011
    Posts
    208

    Default Re: Paint exterior bare metal door

    I agree that flat paints don't clean up as easily as glossier paints. Smooth surfaces are always easier to clean than rough ones. However, when's the last time you cleaned your front door?

    I don't agree that a flat alkyd will show every little mark. I think whomever posted that was thinking of flat latex paints. Latex paints dry to much softer films than alkyd paints, and a soft film marks up much more easily than a harder film.

    If it were my door, I'd paint with a flat alkyd so as to ensure I get good paint adhesion the next time I repaint that door. If I used a high gloss paint, then I'd have to scuff sand that door before repainting, and that's more work than painting it.

    Ordjen: You said: "Regular alkyd paints will oxidize severely."
    What do you mean by "oxidize" in that sentance?

    I agree that an automotive paint is a much better and more protective coating for a metal door than a house paint. But, you're comparing a house paint costing $50 per gallon to an automotive paint costing $150 per quart. There's bound to be a difference in durability.

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