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Posted by Glenn Ashmore on March 25, 2006, 8:53 pm
Please log in for more thread options When I am finishing a piece with a mill rolled finish I start with an 80
grit flap wheel to get it flat then move up one grit at a time to 400. If
it is smooth already, like sheet stainless, I start with 240 of even 320.
Each time be very careful to remove all stretches from the previous pass or
you will have to start over from that grit. After I finish with the 400 I
move to a sewn sisal wheel and a gray polishing compound from McMaster to do
the cut pass. Next I move to a sewn muslin wheel with the gray compound. If
it was welded I hook up to a DC power supply and dunk in Citrisurf for about
5 minutes. Final finish is the white compound on a loose muslin wheel.
After that it gets wrapped in cloth and stored until I have about 50 lbs and
send the batch off to an electropolishing shop in Florida.
That last part is not really needed unless you want it absolutely perfect
and it will be in salt water. If you do the rest of the procedure right you
can hardly tell the difference with electropolishing. Electropolishing
just improves the color and corrosion resistance. It doesn't remove
scratches and if you were not careful with the early stage grinding and have
smeared the steel over a scratch early in the process it will remove the
smear and reveal the scratch. .
--
Glenn Ashmore
I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com
> What are the proper steps of polishing stainless steel to a mirror
> finish ?
>
> Thanks
>
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>finish ?
>
>Thanks
>