Brass and Paint

Brass and Paint

This topic has 4 replies, 4 voices, and was last updated 9 November 2009 at 21:34 by The Mad Professor.

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16 October 2009 at 13:26 #44255
PIERRE COURBOULEIX
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@pierrecourbouleix60628
A simple question (?). May be of some interest to all of us!

How to pepare a brass part to be painted.

What kind of surface preparation before coating,

What kind of primer to use ? ? ?

Thank you for your kind reply

Pierre Courbouleix – F75015 PARIS
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16 October 2009 at 13:26 #21637
PIERRE COURBOULEIX
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@pierrecourbouleix60628
16 October 2009 at 16:40 #44263
charles mortimer
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@charlesmortimer72298
hallo pierre

before priming brass its a good idea to remove the shine using fine wire wool once that is done you require (an etch primer) and idealy it should be sprayed on evenly and thinly one coat is enough the finishing coat can go directely on top of the etch primer and that has to be put on thinly and also best sprayed on . if put on to thickly and the item gets a knock chips in the paint will appear – etch primer helps to stop this problem but needs to be done well pratice on a sheet of aliminum dont use a brush use a compressor and small spray gun and thin the paint

charles
20 October 2009 at 17:35 #44362
Niloch
Participant
@niloch
The following advice is to be found at:

http://www.phoenix-paints.co.uk

Brass, copper, aluminium and nickel silver, in fact all non-ferrous metals should be etch primed before applying any subsequent coats of paint. These metals have an oxide layer which paints do not adhere to very well. Even if abraded with abrasive paper, the oxide layer reforms within 2 or 3 seconds!! Etch Primer has an acid in it to microscopically eat through the oxide layer and into the metal thus providing a key for the paint.
9 November 2009 at 21:34 #44902
The Mad Professor
Participant
@themadprofessor
I have found that putting a thin coat of genuine shellac in methylated spirits onto the clean aluminium, brass etc, and letting it dry, provides a good surface for the paint to stick to.
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