Jewelers compound finer than green?

R

RockysDad

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Jan 3, 2025
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My problem is not knife related but does involve polishing. It seems there are quite a few experts on polishing here.

I have an LCD test instrument with a 4" LCD display that is 4" x 3". I think the display screen is mylar plastic. I cleaned the screen in mistake using Acetone. The Acetone damages a few areas of the screen and there are also subsequent scratches from my cleanup attempt.

I put a buffing wheel on my Dremel tool and loaded it up with green compound. Using a slow speed and moderate pressure, I got 90% of the scratches out. I notice there is a very slight haze on the display where I polished. Is there another polishing compound finer than green? I read that white compound is for metals mostly like stainless steel. Is this a good solution to do a final polish of my display?

Thanks in advance!
 
There are polishes specifically made for plastics. Search for "plastic polish" and you get many returns. If your LCD had an anti-glare coating, it is now gone after acetone and polishings attempts.
 
Be careful with a Dremel and polishing compounds when using them on plastics. Some can generate a lot of heat which can melt the plastic. Green compound does tend to get very hot when used with a Dremel's polishing buff. I've used it that way on nickel- or brass-bolstered knives, which also had synthetic handle covers in Delrin or equivalent, and nearly did irreparable damage to those handles when I lingered more than a second or two at the seam between the bolster and the handle covers.

It's much safer to polish these by hand with a cloth. Compounds like Flitz work very well for that, on both metals and plastics.
 
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Get some automotive polish such as Meguiars 205.
 
As far as actual buffing compounds, pink scratchless is the finest.

It is a final finish for glass, ivory, mother of pearl and all manner of plastics.
 
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