Hi all,
have some galvanised steel railings which were badly painted a few
years ago (e.g. looks like they weren't primed and the gloss paint is
now flaking off)

What's the best way to re-paint them.
Should I just go over them with a sander and put Hammerite on them?
Do you need to be careful how 'deep' the sanding is to protect the
surface layer?

TIA PJ

wrote in message
...
Hi all,
have some galvanised steel railings which were badly painted a few
years ago (e.g. looks like they weren't primed and the gloss paint is
now flaking off)

What's the best way to re-paint them.
Should I just go over them with a sander and put Hammerite on them?
Do you need to be careful how 'deep' the sanding is to protect the
surface layer?

Strip with nitromors back to original plating.
Use correct primer designed for galvanising.
Topcoat in recommended paint from primer manufacturer

In message ,
writes
Hi all,
have some galvanised steel railings which were badly painted a few
years ago (e.g. looks like they weren't primed and the gloss paint is
now flaking off)

What's the best way to re-paint them.
Should I just go over them with a sander and put Hammerite on them?

I had some galvanised garage doors that had just been glossed and were
peeling badly, from memory I just scraped the loose paint off with a
standard scraper, I think it pretty much all came away easily, any bits
that were still adhering I'd have left, painted the bare metal with a
coat of appropriate primer, and eight years later not a sign of flaking.

--
bof at bof dot me dot uk

On 5 Oct, 10:36, wrote:

What's the best way to re-paint them.

Nitromors

A "paint stripper" wheel on an angle grinder. These look like plastic
pan scourers, cost about 7 quid (Toolstation: Aldi's are crap and
Screwfix haven't had stock in 6 months) Be careful with it though, as
they shred very quickly if you catch them on a steel edge.

Then a wire cup brush (twisted wires, good quality, facemask and apron
rather than goggles) on any bits that are really rusty, such that the
galvanising is compromised. You can go other the galvanising too, so
long as you keep a light touch.

Repeat as necessary.

Then apply primer. As you're already galvanised, then I'd use a zinc-
rich primer (expensive but the best) like Davids 182 (car paint
place). This only needs to go over bare steel and where the
galvanising is pockmarked, you don't need to repaint the whole area if
the galvanising is good.

Then repaint. You can go direct to gloss, as weathered zinc is an
excellent base for paint and doesn't need further priming. You might
use an undercoat first if the surface is physically rough and you want
a top-end job.

If you're painting them black and they don't need to be knock-
resistant, then I'd use a bitumen-based paint. Great for gardens and
wall-toppers, but it's soft against wear and doesn't like being
overpainted.

In article
,
Andy Dingley wrote:
You can go direct to gloss, as weathered zinc is an
excellent base for paint and doesn't need further priming.

There's a new estate round here with galvanised railings. Which despite
regular painting always soon look tatty. My bog standard iron ones keep
the paint for much longer. Of course the galvanizing shows through black
more than rust. ;-)

--
*Why do psychics have to ask you for your name? *

Dave Plowman London SW
To e-mail, change noise into sound.

On Tue, 06 Oct 2009 10:12:28 +0100, "Dave Plowman (News)"
had this to say:

In article
,
Andy Dingley wrote:
You can go direct to gloss, as weathered zinc is an
excellent base for paint and doesn't need further priming.

There's a new estate round here with galvanised railings. Which despite
regular painting always soon look tatty. My bog standard iron ones keep
the paint for much longer. Of course the galvanizing shows through black
more than rust. ;-)

New galvanising should be left to weather for at least six months
(preferably a year) before being painted, otherwise the paint will
flake or not stick properly.

--
Frank Erskine

On Oct 6, 10:29 am, Frank Erskine
wrote:

New galvanising should be left to weather for at least six months
(preferably a year) before being painted, otherwise the paint will
flake or not stick properly.

--
Frank Erskine

or use a mordant solution on fresh galv. to speed things up...like an
etch primer in effect.

JimK

In article ,
wrote:
New galvanising should be left to weather for at least six months
(preferably a year) before being painted, otherwise the paint will
flake or not stick properly.

And even then it's best to use a proper 'etch' primer.

Yes - bet they don't leave galvanized car bodies six months to weather
before painting.

--
*If Barbie is so popular, why do you have to buy her friends? *

Dave Plowman London SW
To e-mail, change noise into sound.

On Oct 6, 4:35 pm, "Dave Plowman (News)" wrote:
In article ,
wrote:

New galvanising should be left to weather for at least six months
(preferably a year) before being painted, otherwise the paint will
flake or not stick properly.

And even then it's best to use a proper 'etch' primer.

Yes - bet they don't leave galvanized car bodies six months to weather
before painting.

--
*If Barbie is so popular, why do you have to buy her friends? *

Dave Plowman London SW
To e-mail, change noise into sound.

galvanised car bodies?? whose??

JimK

On 6 Oct, 16:50, jim wrote:

galvanised car bodies?? whose??

A great many of them these days.

As they're done by spraying or electro-zinc rather than hot-dip,
there's no need to leave them 6 months.

Forgot to say thanks for the suggestions offered.

So - Thank you all for your help.

Cheers PJ