finish for brass

[tombstone]

Hi All
Is it possible to get an antique weathered bronze cast finish on a brass machined part preferably without using too many chemicals
Ray

 

[rrnutsplitter]

Hi Tombstone,
I have never heard of anyone doing this. But is a kind of good idea. If you look into bronze patinas for statuary. On Google is where I would start, they might have some info on brass. I have a book on bronze patinas and I will look for it.

 

[dnalot]

Exposure to chlorides will turn copper brass & bronze green and exposure to sulfurs will give a brown patina. I use sulfur tablets I get from a green house supply. Inside a large box I heat a few pellets in a tin over a hot plate and a little bit of water in another tin. I then hang the parts in the box and put a lid on the box. The steamy sulfur atmosphere works quickly. Best done outside as this is a deadly gas and it stinks. They use it in the green house to kill bugs and to combat molds and mildew.

 

[Clockguy]

I have used this for years. It's fast and safe. JL

http://www.micromark.com/blacken-it-4-fl-oz,7267.html

 

[Hopper]

Sandblast or beadblast the bronze first to get that sandcast look, then add the weathering chemicals.

 

[tombstone]

Hi Everybody
Thanks for the suggestions I have the materials to hand including a metal blacking kit left over from the whittle v8 I will turn up some scrap bits of brass and see how it turns out incidentally it is for a small desktop galleon style model cannon with about 2' long barrel
Ray