[General] lexan scratches

[James Fluhler]

If you do replace it definitely add the 3M layer to protect against future scratches! I've also heard of people dual layering the lexan a thick sheet for protection and a thin (cheaper) sacrificial sheet to take small hits and scratches.  

Of course you can always go with glass.

James F.

> On Oct 18, 2013, at 2:38 PM, Cameron Kellough <cameron.kellough at knology.net> wrote:
> 
> David,
> 
> Solvent Vapor Polishing with Dichloromethane is directly from the       old GE (now Sabic) plastics fabrication handbook.  I saw it a long time ago in the GE Lexan Fabrication handbook.  The procedure has been removed from current editions of the handbook due to the more stringent controls on dichloromethane.  I'm attaching the page from the old GE plastics handbook that I had an engineer at Sabic dig up for me.
> 
> Justin may be right however that on a safety-critical part there is risk however since it was originally a manufacturer suggested technique, I'd guess
> as long as no liquid solvent contacts the material that it will be alright.
> 
>> On 10/18/2013 02:28 PM, Justin Richards wrote:
>> I would be careful and trust the manufacturer on this one. If the manufacturer says "this cannot be polished" or "you cannot remove scratches from this" it likely means "Don't try to polish or remove scratches from this if you care about it being able to protect life or property"
>> 
>> Vapor, flame, or abrasive polishing can possibly degrade the material to a point where it will no longer stand up to projectiles (whether they be rocks, bullets, birds, etc), or cause the material to become brittle or less UV resistant (which is important for windshields, being outdoors and all).
>> 
>> 
>>> On Fri, Oct 18, 2013 at 2:21 PM, Erik Arendall <earendall at gmail.com> wrote:
>>> If you are using it as a guard or something you can buy a clear masking film from 3M that protects from scratches.
>>> 
>>>> On Oct 18, 2013 2:19 PM, "Cameron Kellough" <cameron.kellough at knology.net> wrote:
>>>> On 10/18/2013 01:46 PM, David wrote:
>>>> > You guys know of a way to get the scratches out of Lexan, hopefully without having to replace it?
>>>> >
>>>> > Thanks,
>>>> > David Merchant
>>>> >
>>>> It can be solvent vapor polished with dichloromethane.
>>>> 
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> 
> <vapour polishing0001.pdf>
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