Re: [ATM] polishing plastic

["James Lerch" <jlerch1@tampabay.rr.com>]

----- Original Message ----- 
From: "Dominic-Luc Webb" <dlwebb@canit.se>

> Interesting that CeO and rouge are not mentioned anywhere. They
> are selling grits some of us use for fine grinding glass for purpose
> of polishing plastic. By a few accounts, it works well (for plastic),
> quite interesting! I would not have thought to attempt to polish metal
> and plastic surfaces with SiC or AlO grit.

Hi Dominic,

I'm guessing from your observation you have never had the pleasure of wet 
sanding black lacquer paint to produce the "mirror black piano finish" :)

To keep it atm related, here's an example:

http://lerch.no-ip.com/atm/Tri_Dob_Bino_Front.jpg (173Kb)

The three altitude sectors of the Tri-Dob mount are fabricated from 1/2 Birch 
plywood, the grain is filled with automotive body filler, then 14 coats of black 
lacquer, wet sanding with 400 - 1500 grit carbide based sand paper between 
coats.  The final coat is then buffed out with automotive rubbing compound, and 
finally waxed with automotive car wax.

The polishing of plastic came to mind because I've been frequently asked if the 
altitude sectors are fabricated from some type of plastic. :)

Take Care,
James Lerch
http://lerch.no-ip.com/atm (My telescope construction,testing, and coating site)
http://lerch.no-ip.com/ChangFa_Gen (My 15KW generator project)

"Anything that can happen, will happen" -Stephen Pollock from:
"Particle Physics for Non-Physicists: A Tour of the Microcosmos"

" Press on: nothing in the world can take the place of perseverance.
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                                                           Calvin Coolidge





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