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Old 03-08-2013, 10:32 AM   #16
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How to prep a metal fence for painting


Sand Blast, Spray Prime, and Spray Paint. Any other way is brutal, IMO

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Old 03-11-2013, 02:52 PM   #17
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How to prep a metal fence for painting


Update:
Yesterday, I sanded the gate using my 4" Makita and a 50 grit disk. It did a great job and was really fast too. I brushed on a light coat of primer and have a follow up question...should I put a 2nd primer coat on it before I paint it or is one light coat enough?
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Old 03-11-2013, 02:59 PM   #18
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How to prep a metal fence for painting


One coat is enough as long as the bare metal is covered.
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Old 03-11-2013, 03:00 PM   #19
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How to prep a metal fence for painting


50 is a very coarse grit. If it went fast you might consider hitting it with 220. I suspect that you are going to see sanding marks otherwise. Bear in mind that paint hides nothing and shows the flaws. It is a big job altogether, only you can decide what's acceptable (unless the HOA has a fence Nazi, lol). To answer your question though, I personally like a heavier primer coat since it is so important. If it fails, the paint fails with it.
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Old 03-11-2013, 03:09 PM   #20
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How to prep a metal fence for painting


I'll throw on one more coat just for good measure. I didn't notice any unsightly scratches through the primer and I'll decide how it looks once I'm all done painting it. If it doesn't look the way I want, I'll just do the gate over with 220 in a couple of weeks.

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Old 03-11-2013, 03:15 PM   #21
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I'll throw on one more coat just to for good measure. I didn't notice any unsightly scratches through the primer and I'll decide how it looks once I'm all done painting it. If it doesn't look the way I want, I'll just do the gate over with 220 in a couple of weeks.
I hear ya. My experience has been that paint, especially gloss, will show you all of your flaws. Autobody guys take prep work to a religious degree for good reason, not that your fence needs that. You could just paint a small area to see, and bear in mind that the paint will shrink as it cures, hours or a day for oil based alkyds.
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Old 03-11-2013, 06:19 PM   #22
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How to prep a metal fence for painting


You'd probably be better hitting the scaling rust with a wire wheel on a drill. You'll remove the scale without creating more bare steel to prime and you won't scratch the old finish, which is what jasper is concerned about. Did you check with the paint company to determine if they have an oil finish that will bond with no scuff, maybe a Direct to Metal. Remember, the higher the level of gloss, the more sanding is imperative. And you always have to be careful applying oil products. You don't want to apply anything to thick or heavy because the paint could skin over and trap the solvents preventing the complete dry/cure, and the skin will then wrinkle.
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Old 03-12-2013, 10:54 AM   #23
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You'd probably be better hitting the scaling rust with a wire wheel on a drill. You'll remove the scale without creating more bare steel to prime and you won't scratch the old finish, which is what jasper is concerned about. Did you check with the paint company to determine if they have an oil finish that will bond with no scuff, maybe a Direct to Metal. Remember, the higher the level of gloss, the more sanding is imperative. And you always have to be careful applying oil products. You don't want to apply anything to thick or heavy because the paint could skin over and trap the solvents preventing the complete dry/cure, and the skin will then wrinkle.
I didn't check with the paint company since I had already bought the paint and sanded the gate. I did get some of the gate down to bare metal in a few spots, but not too much and I primered it right away. Also, the new paint has no gloss to it at all.
Thanks for the tip about applying the oil-based paint in lightly, I would have anyway, but it's always good to learn the characteristics of the products you're working with.
The gate now has two good coats of primer and I'll put two or three lights coats of paint starting today.
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Old 03-12-2013, 12:30 PM   #24
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Your Patience is admirable. If i couldn't sand blast and spray it, I would talk my wife into liking brown "Isn't that a beautiful color Honey? its called "Ferrous Oxidatious"
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Old 03-12-2013, 12:40 PM   #25
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Your Patience is admirable. If i couldn't sand blast and spray it, I would talk my wife into liking brown "Isn't that a beautiful color Honey? its called "Ferrous Oxidatious"
Thanks. To keep my patience in check,I'm knocking it out 20 minutes at a time after work. It'll get done eventually.
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Old 03-12-2013, 05:34 PM   #26
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How to prep a metal fence for painting


Two normal coats is all you need. Be sure to adhere to drying times closely with oil, or you could get the same effect as with a heavy coat. Read the instructions carefully. Dry and recoat times are longer in cooler damp conditions.

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