Painting over brass

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25 October 2007 at 15:42 #10840
ray cockburn
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@raycockburn71127
Hi, Has anyone any advice regarding painting over brass. Does the brass have to be treated first, if so, with what? What is the best paint to use after that? Any help would be appreciated. Thankyou
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25 October 2007 at 16:43 #10842
Paul T
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@pault84577
Hi Ray

It depends on where the brass is(e.g. underwater/outside/indoors) and how big an area the brass covers.

All the best

Paul
26 October 2007 at 09:03 #10848
ray cockburn
Participant
@raycockburn71127
Hi Paul, I am building a model sailing barge, and some of the fittings that I will need often are only supplied in brass which does not exactly match with the type of fitting found on these craft. I am thinking more of deck fittings which will not necessarily be under water(unless it sinks) . Ray
26 October 2007 at 20:37 #10853
Paul T
Participant
@pault84577
Hi Ray

Before painting give the brass a quick rub down with wire wool to give the paint a key then wash the parts with soapy water to remove any grease. After this hold the parts with tweezers to prevent the grease from your hands from going on them whilst you rinse them off then dry with clean cloth. You should then apply one coat of metal primer within half an hour.

Sounds a bit complex but it does work.

All the best

Paul
27 October 2007 at 08:42 #10858
ray cockburn
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@raycockburn71127
Thanks Paul.
27 October 2007 at 13:49 #10867
Paul T
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@pault84577
No problem Ray, let us all know how you get on.
23 October 2008 at 14:36 #16693
Norberto Pontes
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@norbertopontes89535
I use after a clean with soap etc…

Chromate Wash primer(if possible) two fine layers in interval descript in the wash can. i think 5 minutes.

So after dry in the specified time

i use a sintetic primer surfacer fast grey(lazzulac of Lazzuril – Sherwin Willians) after wash primer and left dry.
23 October 2008 at 14:37 #16694
Norberto Pontes
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@norbertopontes89535
ops after you can paint. in my case i use automotive paint.
23 October 2008 at 14:46 #16695
Norberto Pontes
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@norbertopontes89535
A warning:

is fundamental paint with primer surfacer after the exactly time for wash primer.

if you don’t respect this time and your primer surfacer coat is more than this time

a new coating of wash primer is necessary cause the adrency of wash prime is lost.

But if you respect this time the preparation for metal painting is as success.

Maibe be painting in a warm day if possible(in the case of Wash primer) in the case of primer surfacer any time.
23 October 2008 at 19:21 #16704
neil hp
Participant
@neilhp
b*****Y h**L, whats wrong with just slappin’ it on an’ ‘ope fo’ th’ best.
23 October 2008 at 20:11 #16707
ashley needham
Participant
@ashleyneedham69188
I was just going to echo Neils sentiments. Virtually everyone uses brass prop tubes.. and how many poeple bother to carry out these surgical painting methods?? I dont and I have never had a problem.

Theoretically aluminium DOES need an etch primer or something, and galvanised finishes also need a special primer for adhesion, but brass?? I dont think so. Ashley

NB so saying, a rub down with steel wool to key the surface would obviously help, but this would apply to any shiny/smooth surface.
23 October 2008 at 20:21 #16709
Norberto Pontes
Participant
@norbertopontes89535
well, somebody have your finishes…
1 November 2008 at 22:08 #16860
Mike Gibbons
Participant
@mikegibbons
It’s O.K slapping it on "an’ ‘opin for the best", trouble is it don’t stick very well. If it’s in a position where it might get knocked (even lightly) it will just chip off, and keep the masking tape away from it. I’ve read that etch priming is esential — ask the Locomotive boys. I’ve had good results with etch primer from Pheonix Precision Paints, they do a one pack or a two pack kit, though there are other suppliers.
9 January 2009 at 19:20 #6406
ray cockburn
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@raycockburn71127
25 May 2009 at 18:07 #21097
Brian Morris
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@brianmorris30448
I have read all the above ,however iam told that if i clean up the brass and soldered joints on my gantry and then varnish it prior to priming with h***fords primer the paint will adhere correctly. is a good idea saving using etch primer etc ?
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