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What to Use to clean up USPS Doors

510 Views 11 Replies 8 Participants Last post by  John Smith_inFL
Does anybody know of any chemicals I could use to clean up some brass USPS doors I recently bought? They have a lot of green corrosion on them.
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Brasso would work if they are not coated with lacquer. If they are coated in lacquer you would have to use acetone and clean the lacquer off first. Once clean I would wipe the brass off with lacquer thinner or acetone and spray with brass lacquer to prevent them from going green again.
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Does anybody know of any chemicals I could use to clean up some brass USPS doors I recently bought? They have a lot of green corrosion on them.
A solution of two parts white vinegar to one part hydrogen peroxide (common 3% solution) will remove tarnish and surface lead from brass parts when they are soaked for 5 minutes or less at room temperature.

Are there other metals on those doors, which may come into contact with what ever cleaning solution you use? Different metals may/will react in different manners.
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Unless you’re just really into doing it, I would take them to a plating shop and have them polish them up. It will take them minutes with the right equipment.

Lacquer will keep them shiny for a while, but if they’re exposed to sun, the lacquer will start to peel.
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calabrese55
One more thought if you are thinking of selling those doors instead of using them you might think twice about removing the patina. The green coloration take a long time to grow on brass / copper and is a coveted feature for antique types .
Just a comment not a recommendation.
calabrese55
I am going to make them for coin banks. I am not sure that if the banks are new the corroded doorswoul look bad on them
Another suggestion that I've used successfully on "real" brass is BarKeeper's Friend powder. It removes any discoloration, usually with one process.

Don't use it dry. Scrub it lightly a bit with a green pad, rinse it with warm water after a minute, and wipe dry. Or it may cause some discoloration, if left on any longer. It will also "remove any lacquer" that may be on your surface -- omits one of your steps immediately.

I do the removal process and then polish with Brasso, followed by a spray of lacquer. Sells in most all stores for about $2 a can and it's worked well for me with antique lamp bases, door knobs, etc.

Ingredient Drink Solvent Metal Cuisine
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Another suggestion that I've used successfully on "real" brass is BarKeeper's Friend powder. It removes any discoloration, usually with one process.

Don't use it dry. Scrub it lightly a bit with a green pad, rinse it with warm water after a minute, and wipe dry. Or it may cause some discoloration, if left on any longer. It will also "remove any lacquer" that may be on your surface -- omits one of your steps immediately.

I do the removal process and then polish with Brasso, followed by a spray of lacquer. Sells in most all stores for about $2 a can and it's worked well for me with antique lamp bases, door knobs, etc.

View attachment 449926
yes that stuff is great
calabrese55
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Livingston - I asked on your other threads. If you could provide some photos of what you have, it may make a difference in the options that we are providing.
I am going to make them for coin banks. I am not sure that if the banks are new the corroded doorswoul look bad on them
You might try to search some of the craft selling sites, see what is selling. I would rather have a door that shows age. Otherwise … how do i know it wasn’t made in china last month?
I bought a few off of Ebay that "appeared" to be brass plated pot metal. IF I wanted to spruce it up a bit, I would be very cautious with the aggressive rubbing and cleaners used as it could do more harm than good. IF it is solid brass, you can remove the dial pin and put it on a buffing wheel and make it really shine. But, that is a horse of another color and totally a personal call as to what you want the finished item to look like. PHOTOS of your completed projects would be nice to see. Just for a novelty project being sold at craft fairs, I wouldn't put too much effort into it for the price it sells for.
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