<div dir="ltr">Or transparent aluminum...<div><br></div><div>Sorry, couldn't resist.</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Oct 18, 2013 at 2:49 PM, James Fluhler <span dir="ltr"><<a href="mailto:j.fluhler@gmail.com" target="_blank">j.fluhler@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div>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. </div>
<div><br></div><div>Of course you can always go with glass.<br><br>James F.</div><div><div class="h5"><div><br>On Oct 18, 2013, at 2:38 PM, Cameron Kellough <<a href="mailto:cameron.kellough@knology.net" target="_blank">cameron.kellough@knology.net</a>> wrote:<br>
<br></div><div><span></span></div><blockquote type="cite"><div>
<div>David,<br>
<br>
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.<br>
<br>
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<br>
as long as no liquid solvent contacts the material that it will be
alright.<br>
<br>
On 10/18/2013 02:28 PM, Justin Richards wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">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"
<div>
<br>
</div>
<div>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).</div>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Fri, Oct 18, 2013 at 2:21 PM, Erik
Arendall <span dir="ltr"><<a href="mailto:earendall@gmail.com" target="_blank">earendall@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<p dir="ltr">If you are using it as a guard or something you
can buy a clear masking film from 3M that protects from
scratches. </p>
<div>
<div>
<div class="gmail_quote">On Oct 18, 2013 2:19 PM,
"Cameron Kellough" <<a href="mailto:cameron.kellough@knology.net" target="_blank">cameron.kellough@knology.net</a>>
wrote:<br type="attribution">
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On 10/18/2013 01:46 PM, David wrote:<br>
> You guys know of a way to get the scratches out
of Lexan, hopefully without having to replace it?<br>
><br>
> Thanks,<br>
> David Merchant<br>
><br>
It can be solvent vapor polished with
dichloromethane.<br>
<br>
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