Author Topic: Silver wrist inlay  (Read 6506 times)

Little Brother

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Silver wrist inlay
« on: January 14, 2013, 03:58:17 AM »
I bought an intricate cast silver thumb piece inlay for my fowler build (see pic).  Question is, how do I get it cleaned up?  The cast surface isn't as fine as I'd like.  I think it was actually a second because it had some minor flaws.  I very quickly tried scraping, but I've never scraped metal before and it left quite a chattered surface.  I'll be reading more about that.  I have a bunch of Gesswein stones that I used with great success on my steel trigger guard and lock, but I figured they would just load up immediately on the soft silver.  Sandpaper seems the way to go, but the inlay has round bottom flutes that will be a real pain.  Anybody have any tips they'd like to share?


Offline Jim Kibler

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Re: Silver wrist inlay
« Reply #1 on: January 14, 2013, 04:50:34 AM »
The process I've used is to scrape some of the bad areas, followed by using stones with cutting oil to keep them from clogging up.  Takes time, but works well.  Shape the stones to get into the hollows etc.  A graver can be used to sharpen corners and help define things as well.  After this, I would just go over it with some scotchbrite and then buff with a little steel wool.


Offline Captchee

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Re: Silver wrist inlay
« Reply #2 on: January 14, 2013, 10:58:19 AM »
when you scrape , you have to use alternating directions.
 I also use files .. Those small cheep needle files you  see at the auto parts store or walmart . Pick up a set . Then heat and bend the ends to make a shoe   chalk them up and start filing . 
Then come back with pieces of emery glued to the end of small dowels  to  finish

Little Brother

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Re: Silver wrist inlay
« Reply #3 on: January 14, 2013, 03:29:59 PM »
Thanks Guys.  I'll give it a go.

Ben

docone

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Re: Silver wrist inlay
« Reply #4 on: January 14, 2013, 04:32:24 PM »
To really smooth a piece like that, use either pitch or an hard bedding compound to hold the piece.
You would heat it and let it sink into the pitch, than heat it to remove it.
When I do things like that, I use a muslim wheel on my hand piece, with ZAM!. I then either tumble in stainless shot, or use a stainless wire brush wheel to even it all out.
The final polish would be in the tumbler.
Go small, keep it even and level, and take your time. It can be done. Any repairs, use Hard Solder. It will match the colour.

Offline Jim Kibler

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Re: Silver wrist inlay
« Reply #5 on: January 14, 2013, 04:59:19 PM »
If you follow this link you will see some hardware that where I used the method I described above in finishing them.  http://contemporarymakers.blogspot.com/2012/10/jim-kibbler.html

I personally would beware of methods that tend to polish or buff the entire object at once.  In my view it's best to use techniques where the tool or abrasive element is used on specific contours at a time. 

Jim

sweed

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Re: Silver wrist inlay
« Reply #6 on: January 14, 2013, 05:34:25 PM »
Hey Guys. I've run across this several times and need a little more clarification. 


 I also use files .. Those small cheep needle files you  see at the auto parts store or walmart . Pick up a set . Then heat and bend the ends to make a shoe  chalk them up and start filing . 
Then come back with pieces of emery glued to the end of small dowels  to  finish

I assume this prevents cloging of the file. Do you use chalk board (school) chalk, or soap stone as in iron work marker? :-[ Just never heard of this until I came here to the "fount of knowledge" ;D

Offline Curtis

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Re: Silver wrist inlay
« Reply #7 on: January 14, 2013, 05:47:02 PM »
Swede,

Cheap children's sidewalk chalk works great.

Curtis
Curtis Allinson
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Sometimes, late at night when I am alone in the inner sanctum of my workshop and no one else can see, I sand things using only my fingers for backing

mtgraver

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Re: Silver wrist inlay
« Reply #8 on: January 14, 2013, 06:42:02 PM »
I have a tendency to recut the engraving, use scrapers, files and sand paper when need, then burnish. I agree with Jim, don't buff, hand polish for a professional appearance. Scrapers need to be sturdy and honed sharp, I like a slight heel on some instead of a burr as used on wood. change directions before too much chatter is developed.
Mark

Offline Acer Saccharum

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Re: Silver wrist inlay
« Reply #9 on: January 14, 2013, 06:48:17 PM »
Don't forget that burnishing is a great technique for polishing areas that can't be polished easily. You need a flat surface to burnish, or all the dips and bumps will be nice and shiny.
Tom Curran's web site : http://monstermachineshop.net
Ramrod scrapers are all sold out.

Offline mark esterly

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Re: Silver wrist inlay
« Reply #10 on: January 15, 2013, 01:11:19 AM »
sweed
  i have used both blackboard chalk and soapstone on files. they both work
living in the hope of HIS coming.......

tyro

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Re: Silver wrist inlay
« Reply #11 on: January 15, 2013, 02:35:53 AM »
Swede, Use the card and brush a lot to keep teeth clean so U don't score your work. U can also use a sharp scribe like a pencil to "chase" the pattern and a fine diamond point to deepen the design,,use it like a swivel knife to draw the lines more crisp than U can with the scribe..U can also find or make small ball tipped burnishers to gently polish out some casting or tool marks. practice on a nickle to see if it does what U want it to do..TY

Offline kutter

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Re: Silver wrist inlay
« Reply #12 on: January 15, 2013, 02:56:50 AM »
A couple different ways to shape high relief..
Rough cut needle files heated and bent to a slight curve work well with silver, gold, copper, ect.
Using a rough cut file to start with as they don't load up as easily,,and if they do they are much easier to clean out. Usually just a sideways swipe or two on a piece of rough cloth like your shop apron.

Also when the rough cut file is bent into a curve, the teeth will spread apart even more giving them a scraper type of effect. But you don't get the chatter like using a single edge tool as the other teeth even the cut and motion out.

Round & half rounds are your friends for smoothing details on 'chased'  work which this really is. It's been cast instead of hammer&chiseled to shape,That's the only difference.
But tri-square and others are helpful too for line details.
Burnishing will brighten the silver up to the highest polish you can get if your burnisher is polished that well.
Just small odd shaped steel tools made to fit the contours you need to polish.
The more you get into a high relief design with something like steel wool, polishing paper, ect,,the greater chance there is of rounding off any sharp line contrast you've already worked to accomplish.
Very careful work with shaped polishing sticks, ect is used,,but carefully is the word.



When doing this type of work on steel hi relief, stones can be used effectively.
We used to use some call 'Water of Ayr' & 'Tam 'O Shanter' (sp?). I think they were a natural stone.
They were somewhat soft and quickly shaped themselves to area you were polishing.
Used w/water as a lube they were messy to use but worked well.

I never used them on gold or silver inlays. They just loaded up w/the soft metal then you had to pick it off the surface to continue.

Maybe something else is around like a modern ceramic stone that'd work. I should exit the early/mid 20th Century sometime and maybe  take a peek at what they're using now.




Much of the high relief work detail can be done with punches also. Both smooth and surfaced tectured and of different face contours to shape the metal to your liking.
Once roughed out w/hammer & chisel you are at the same point that the casting here presents.
From there the punches form the piece to its final shape and finish. Very little final polishing, stones, ect is done after that in such work.



What ever the method,, it's easier and even better for contrast to leave the deeper cuts a little less polished and then give the standing edges and areas the higher polish.
Great contrast effect and once Ma' nature takes over with some tarnish in those deeper cuts on the silver they'll look even better.
Some very low and hard to get at areas can be lightly stippled too. No law against tarting the thing up with a bit of stippling, punch dots (don't over do it!) or even a few engraved lines to define things

Normal handling will keep the high-lights burnished bright and your finish work will look fine as long as you have kept the lines as smooth flowing and crisp as possible.

Just some thoughts.
« Last Edit: January 15, 2013, 03:12:04 AM by kutter »

Little Brother

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Re: Silver wrist inlay
« Reply #13 on: January 15, 2013, 03:43:09 PM »
Thanks for all of the suggestions and information guys! I've been able to work on it the last two nights and I'm satisfied with the results.  It went suprisingly faster than I thought.  I have some bent rifflers that I used on the large surface in the middle first.  That area had quite a large depression, so much of the surrounding material had to be taken down.  I scraped out the riffler cuts and then went to work with the stones.  A 600 grit stone did most of the work truing everything up.  I did make a very small scraper that worked well in some of the really tight spots.  But, besides that, I just shaped the stones to what I needed and made relatively quick work of it.  Got a good consistent finish with 4 ought steel wool.
Should be able to inlet it tomorrow night and then I'll be done with ALL of the inletting work!  Hope to have the whole thing wrapped up in two or three more weeks.

Thanks again!
Ben

Offline Acer Saccharum

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Re: Silver wrist inlay
« Reply #14 on: January 15, 2013, 06:54:48 PM »
The Gesswein "Ultra Soft" stones may work with silver and gold. I used them with great success on aluminum tooling.
Tom Curran's web site : http://monstermachineshop.net
Ramrod scrapers are all sold out.

Offline Jim Kibler

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Re: Silver wrist inlay
« Reply #15 on: January 15, 2013, 07:07:59 PM »
Most stones work just fine with non-ferrous metals provided you use cutting fluid.  No trouble at all.  Probably 90% of the work on the silver castings shown in the link I included was done with stones. 

Offline smart dog

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Re: Silver wrist inlay
« Reply #16 on: January 16, 2013, 08:00:00 PM »
Hi,
I use 4 tools to smooth and polish those flutes and grooves.  Small round stones or pencil stones lubed with oil.  Gesswein sells what you need.  The pencil stones fit in a pen-like tool handle with collet and chuck.  I use the same handle with small diamond burrs, the kind you might buy for a Dremel or Foredom tool.  Rubbing by hand with the burrs works very well to cut and smooth quickly.  Finally, I make pencil points out of hardwood, dip them in mineral oil and then pumice or rottenstone to polish the metal.  My favorite tools for sharpening edges and cleaning up castings are die sinkers chisels (from Gesswein or Brownells) and a chasing hammer.  I use round bottom chisels for shaping and cleaning those pesky flutes.

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