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 Posted: Mon May 19, 2008 10:01 pm
Is there a way to use a patina on only part of a work of metal? I'm thinking of using rust, tarnish and copper oxide on a future piece in the forms of stripes, spots and highlights, but I don't know if that would work or if it's as controllable as I would need it to be.
Metal sculptors, have you ever used patina to enhance a sculpture? How well did it work? What did you use to make it look how you wanted it to look? How did you stop the metal from oxidizing further?
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Posted: Mon May 26, 2008 12:19 am
there are ways to patina selected areas on a piece metal. my favorite and easiest way in my opinion is to apply the patina with a brush. second favorite is to patina the whole thing the use lots of duct tape to cover where i want patina to stay and then sandblast the rest.
the patina i use regularly is "liver of sulpher" and thats good for bronze, brass, copper, silver. and it has color properties that if caught have violets and blues in it, otherwise it can be more brownish or darkbrown/black.
if your working with steel, the only things i've tried is "ferric nitrate" and "ferric chloride". these are both in the rust color range, the chloride is a little more orangish. both of those you have to apply to hot metal, or you could apply it then heat the metal, either way its a bit harder to control putting it on. like i said above though you could tape it off and knock off anything you don't like with a sand blaster.
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Posted: Sun Feb 22, 2009 11:06 am
(old but for future reference to anyone who might want to make a similar thread but sees one already on the subject)
I'd recommend to patina the whole thing and then take off what you don't need by covering what you want with tape and sandblasting the rest off (Like someone else had said), or filing and sanding. Obviously, sandblasting it will go a lot faster and help areas difficult to sand or file off the patina but with sanding and filing, you can create a more gradual transition or add design work. Then you can always use a combination of both.
The reason I recommend to patina the whole thing and not just select areas is it's easier to get a more even coloring (just applying with a brush in different parts might end up looking a bit blotchy or sloppy... Although, it depends.... You might want that if it goes with your design).
Yes... I have used patinas for my work and it's been alright (Usually, I just patina a little and then file or sand off highlights for added line quality, and then patina, sand, or so on for variations or get some back). Regrettably though, the main issue for me has been not thinking of how I want to color and finish my work and by then, not having time to really do anything to make it so nice. I suggest setting time to figure that out and not rush it (Fortunately, it won't be an option to rush the finishing of my next project).
Then preventing further oxidation depends on the metal... I usually just work in copper (because I'm just learning) and copper likes to oxidize no matter what... All I know to do is put on trewax to try to keep it clean longer but I don't know... I don't know how well it holds over the long run.
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