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Spray Paint/Powder Coat? CWLee 11-16-2007
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Posted by CWLee on November 16, 2007, 2:33 am

I don't understand the difference, in terms of longevity and
appearance, of painting a sheet of perforated steel with
black paint from a spray can, or having it powder coated
black. The holes in the steel are very small diameter
(1/16") and close together (1/8" centers). This sheet of
steel "screen", about 3' by 4', will be going into a screen
door, replacing the older and deteriorating mesh screen
currently there.

I'm concerned about some of the holes filling with paint,
but that seems a risk in either case.

On what basis would you decide between these two approaches
to coloring the raw steel black? Do you have other
suggestions for this project?

Thanks.
--
----------
CWLee
Former slayer of dragons; practice now limited to sacred
cows. Believing we should hire for quality, not quotas, and
promote for performance, not preferences.


Posted by HotRdd on November 16, 2007, 9:36 am
powder is typically tougher and ticker than paint. It will also cover every
arte of the steel as it is electrostaticly coated, and not subject to your
angle of attack. I think in this case a can of spray paint is the way to go,
specially if the metal screen is close.


>
> I don't understand the difference, in terms of longevity and
> appearance, of painting a sheet of perforated steel with
> black paint from a spray can, or having it powder coated
> black. The holes in the steel are very small diameter
> (1/16") and close together (1/8" centers). This sheet of
> steel "screen", about 3' by 4', will be going into a screen
> door, replacing the older and deteriorating mesh screen
> currently there.
>
> I'm concerned about some of the holes filling with paint,
> but that seems a risk in either case.
>
> On what basis would you decide between these two approaches
> to coloring the raw steel black? Do you have other
> suggestions for this project?
>
> Thanks.
> --
> ----------
> CWLee
> Former slayer of dragons; practice now limited to sacred
> cows. Believing we should hire for quality, not quotas, and
> promote for performance, not preferences.
>



Posted by SteveB on November 16, 2007, 10:44 am

>
> I don't understand the difference, in terms of longevity and
> appearance, of painting a sheet of perforated steel with
> black paint from a spray can, or having it powder coated
> black. The holes in the steel are very small diameter
> (1/16") and close together (1/8" centers). This sheet of
> steel "screen", about 3' by 4', will be going into a screen
> door, replacing the older and deteriorating mesh screen
> currently there.
>
> I'm concerned about some of the holes filling with paint,
> but that seems a risk in either case.
>
> On what basis would you decide between these two approaches
> to coloring the raw steel black? Do you have other
> suggestions for this project?
>
> Thanks.
> --
> ----------
> CWLee
> Former slayer of dragons; practice now limited to sacred
> cows. Believing we should hire for quality, not quotas, and
> promote for performance, not preferences.
>

Spray painting @ 2 cans would be less than ten bucks for GOOD paint.
Powder coating might be ten bucks a square foot.

No doubt about it that powder coat would last longer, as it is baked on, and
has a surface sealing glaze.

If it was me, I'd just clean it REALLY good, then spray it with Rustoleum or
Krylon. And then, you can touch if up every couple of years.

With either process, the talent of the painter will determine if the holes
are plugged or not. If you spray it, figure on about four VERY light coats,
with a couple of hours in between. The only thing that can clog the holes
is putting too much paint on at once.

Spraying it is the way to go. Hang it up with two pieces of wire, one at
each corner. Do it in a pattern of straight lines across the piece. Let it
dry for two hours, then turn it ninety degrees. Repeat until you think it's
covered. On your first coat, it should look like you've missed it and some
of the metal should show through. That's how light a coat you want to keep
from clogging the holes.

Steve



Posted by DanG on November 16, 2007, 10:19 pm
Read the directions on the can, most spray paint will bubble and
blister if you recoat after an hour.

--
______________________________
Keep the whole world singing . . . .
DanG (remove the sevens)
dgriff237@7cox.net



>
>>
>> I don't understand the difference, in terms of longevity and
>> appearance, of painting a sheet of perforated steel with
>> black paint from a spray can, or having it powder coated
>> black. The holes in the steel are very small diameter
>> (1/16") and close together (1/8" centers). This sheet of
>> steel "screen", about 3' by 4', will be going into a screen
>> door, replacing the older and deteriorating mesh screen
>> currently there.
>>
>> I'm concerned about some of the holes filling with paint,
>> but that seems a risk in either case.
>>
>> On what basis would you decide between these two approaches
>> to coloring the raw steel black? Do you have other
>> suggestions for this project?
>>
>> Thanks.
>> --
>> ----------
>> CWLee
>> Former slayer of dragons; practice now limited to sacred
>> cows. Believing we should hire for quality, not quotas, and
>> promote for performance, not preferences.
>>
>
> Spray painting @ 2 cans would be less than ten bucks for GOOD
> paint.
> Powder coating might be ten bucks a square foot.
>
> No doubt about it that powder coat would last longer, as it is
> baked on, and has a surface sealing glaze.
>
> If it was me, I'd just clean it REALLY good, then spray it with
> Rustoleum or Krylon. And then, you can touch if up every couple
> of years.
>
> With either process, the talent of the painter will determine if
> the holes are plugged or not. If you spray it, figure on about
> four VERY light coats, with a couple of hours in between. The
> only thing that can clog the holes is putting too much paint on
> at once.
>
> Spraying it is the way to go. Hang it up with two pieces of
> wire, one at each corner. Do it in a pattern of straight lines
> across the piece. Let it dry for two hours, then turn it ninety
> degrees. Repeat until you think it's covered. On your first
> coat, it should look like you've missed it and some of the metal
> should show through. That's how light a coat you want to keep
> from clogging the holes.
>
> Steve
>



Posted by Norminn on November 17, 2007, 3:04 am
CWLee wrote:

>I don't understand the difference, in terms of longevity and
>appearance, of painting a sheet of perforated steel with
>black paint from a spray can, or having it powder coated
>black. The holes in the steel are very small diameter
>(1/16") and close together (1/8" centers). This sheet of
>steel "screen", about 3' by 4', will be going into a screen
>door, replacing the older and deteriorating mesh screen
>currently there.
>
>I'm concerned about some of the holes filling with paint,
>but that seems a risk in either case.
>
>On what basis would you decide between these two approaches
>to coloring the raw steel black? Do you have other
>suggestions for this project?
>
>Thanks.
>
>
Sounds like one of those things that looks good on paper, but won't work
so well. Seems like you have a choice between plugging some holes with
paint or leaving spots of steel unpainted and eventually rusting. Is
this for security?

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