High-End Mechanicals Chat, Tips, and Pics

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Idaholandho

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polished brass contacts (chi you) - using 3M Hand Glaze- great stuff!
YLgIXBS.jpg

Looks like you sanded it or took some sort of dremel device to it . As the Chi's I have owned display a completely, perfectly flat, shiny and well machined contact that have never needed polishing of any sort.
 
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evgeny131

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Looks like you sanded it or took some sort of dremel device to it . As the Chi's I have owned display a completely, perfectly flat, shiny and well machined contact that have never needed polishing of any sort.
i did nothing but use a microfiber cloth and 3M hand glaze.....and then a toothbrush with soap and water...lol...no dremels or sand paper to my brass chi...:vapor:
the brand new contacts were not shiny- they came stock with a sort of brushed finished- like the inside of the flat cap...i thought they would conduct even better if polished
 
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ukeman

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so 3M for brass… i need something for my NB Neme's bad…. i use a fiberglass pen for brass contacts. wonder if 3m or other polish on the contacts would just put a coat over the contacts and actually hinder conductivity? 3M says its a compound as well but it does polish too.
i did nothing but use a microfiber cloth and 3M hand glaze…..and then a toothbrush with soap and water…lol…no dremels or sand paper to my brass chi…:vapor:
the brand new contacts were not shiny- they came stock with a sort of brushed finished- like the inside of the flat cap...i thought they would conduct even better if polished
 

evgeny131

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so 3M for brass… i need something for my NB Neme's bad…. i use a fiberglass pen for brass contacts. wonder if 3m or other polish on the contacts would just put a coat over the contacts and actually hinder conductivity? 3M says its a compound as well but it does polish too.

3m has a rubbing compound in graded abrasive strength, A B or C, or 1 2 3......get the lowest (A, or 1) depending on the year of the product
they also have a hand glaze with much less abrasive chemicals.......also graded- i get the lowest....
these are meant for a car- but i always use a toothbrush and soap after I polish to get the residue off....it works for me...
i never polish silver plated contacts- just use a toothbrush and soap.....
or silver cleaner specifically...
the metal polish compounds are not meant for plated items.
 

evgeny131

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Or some brasso and an old shirt usually does the trick.
yeah but it eats away at the etching.....brasso is about 30yrs old, has ammonia among other very toxic chemicals, and is considered old school even by those in the industry....its cheap-yes- it does the job- yes-
but it eats the engravings and leaves scratches- there are much better products out now
 

Richard75

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yeah but it eats away at the etching.....brasso is about 30yrs old, has ammonia among other very toxic chemicals, and is considered old school even by those in the industry....its cheap-yes- it does the job- yes-
but it eats the engravings and leaves scratches- there are much better products out now

As I often point out, Brasso is rumored to weaken brass, allowing it to crack and break easier, as the ammonia in the Brasso may literally eat away the copper in the alloy. Again, this is just a rumor, but I can say that ammonia does dissolve copper, it's just not exactly known how it treats alloys with copper.

Either way, I prefer Mother's (preferably Billet, but I have some Mag & Aluminum as well), which is petroleum-based if I recall.
 

mavric

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We used Brasso exclusively when I was in the Navy Honor Guard to shine our brass. It would eat away the brass over time after countless hours of polishing and buffing on towels, but it never cracked or weakened it. I'm sure there is much better stuff out there now, but if you're trying to get pits or deep scratches out, nothing comes close.
 
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