WWI Monument

[tunatussle]

I am cleaning a WWI Monument. Center is Marble surrounded
by concrete. On top is a very old cannon. Problem is on
surface of the marble a blue line has run dowm from the
gun area (maybe gun had some alloy of copper or other
metal the gives the blue patena). I was able to get rid
of the rust runs with oxyllic acid but the blue would not
give up. Any ideas would be appreciated. The Monument is near a heavy traffic area so not sure that the traffic did
not cause the blue.

 

[oneness]

tuna:

If you can't get an answer here, try calling to any local monument works. They should be able to give you suggestions. Wish my grandfather still had all his faculties...He owned a monument company in Flagstaff, AZ for the past 50 years or so. At this point, however, he doesn't remember much.

Hope you find an answer. I think it is great what you're doing, cleaning the monument. Thanks!

 

[Paul B.]

Acids like Hydrochloric will clean patina off copper rather fast, but it would be a bit harsh for polished marble.

Prosoco has a wide range of products that may work on your problem (www.prosoco.com) or (800) 255-4255. They can tell you who the local rep. is in your area.

I know they have Marble Poultice and a bunch of other chemicals for granite, limestone and marble restorations. You can also check with your local masonry supply stores in your area. The better ones will usually carry a range of products or have access to it.

Best Wishes!


Regards,

 

[ron p]

it may need

to be polished out. It might have etched the stone.
can you feel it when you rub your fingernail over the blue?
Is it in or on top?