AMP - Accurate Model Parts
General Modeling => TECHNIQUES => GENERAL => Topic started by: kurt on 20 Jun , 2012, 09:29
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Does anybody have any recipes for chemically treating brass to take on a bronze appearance?
Kurt
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I do! I recommend the shortcut, but here's what I did:
(http://www.rokket.biz/modelsweb/rokket/u557/images/prop_un.jpg)
(http://www.rokket.biz/modelsweb/rokket/u557/images/pointyprop.jpg)
(http://www.rokket.biz/modelsweb/rokket/u557/images/final/rudders.jpg)
I filed the snub hub to a point, and then soaked it in saltwater and vinegar for many, many weeks. It was faster to add a bit of hydrochloric acid.
http://www.rokket.biz/modelsweb/rokket/u557/prog1.shtml (http://www.rokket.biz/modelsweb/rokket/u557/prog1.shtml)
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Bumping this thread because i recently experimented with White Vinegar and Peroxide.
It actually does work but the smell can be unpleasant.
Mixing a small amount of 50/50 percent into a small glass jar with top and throw the parts in the mixture re seal it shake it from time to time and it works in a few days in the jar.
Or outside the jar, brush the brass with the mixture and letting it fully dry between coats sometimes it takes several coats.
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nice to know, both of those are easily available and in small quantities. I only had the hydrochloric because of some brick work at the time, but easier and cheaper to by vinegar and peroxide!
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Been researching this a bit further and it seems for getting a weathered "bronze" your way is better Rokket.
(http://1.bp.blogspot.com/-hrIZb-czo48/TV4svF3UoDI/AAAAAAAAA3w/RSNwhBQYGyM/s1600/Screen+shot+2011-02-18+at+12.13.45+AM.png)
The vinegar and peroxide method appears to be best for etching the brass in preparation soldering or gluing.
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Interesting!