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Same with any grinding compound: The components are selected for their
shape, hence 'cutting' ability, hardness, purpose, cost, etc. A compound
with large particles with sharp edges will cut deeper and faster than
one with particles of a softer and/or more rounded shape. The kit I
bought came with a paste consisting of rhyolite and whatever semi-liquid
was used to make it a paste; it appears aluminum oxide is also used.
A coarser compound will remove deeper scratches, but leave its own
scratches. You can start with a coarser compound to remove larger
scratches, then switch to a finer compound to remove smaller scratches,
and so on; just like you might start rubbing paint--or filler--with
320grit sandpaper, then 400, then 600, 1200, etc. Some polishing
compounds do that 'automatically,' they start with larger particles
which themselves break down to smaller particles and successively smooth
the surface. McGuiars (sp?) has several compounds, all graded on a
thermometer-like scale for their cutting (deep) or polishing (fine)
characteristics.
I appears the lapidary (mineral-polishing) crowd has lots of discussion
re: best compounds. Cerium oxide is mentioned a lot, rhyolite some, but
I didn't see any mention of zinc oxide. Zinc is a soft metal and may not
lend itself to being a good polishing compound, for glass anyway. Cost
will (always) be an issue, rhyolite may be a better compound than cerium
oxide but may cost more, or vice versa.
bs
On 9/30/2023 9:46 AM, llennep@verizon.net wrote:
> What is special about cerium oxide? Â Why not use zinc oxide?
>
> On Saturday, September 30, 2023, 04:20:50 AM EDT, Mark Donaldson
> <ardmorebusiness@xtra.co.nz> wrote:
>
>
> Ira,
>
> I have a spare windscreen with wiper blade â??rainbowâ?? scratches on both
> sides. To remove them I have purchased some CERIUM OXIDE to make a
> paste and hand-polish them out.
>
> The people at the glass company told me the process will be slow (a
> lot of elbow grease) but applying it to a soft rotary pad will speed
> up the procedure.
>
> My cost equates to about US $15 for 4 ounces. That amount should do
> the whole windscreen.
>
> Here is a useful YouTube link: https://youtu.be/4ZJPPC1ak50
> <https://youtu.be/4ZJPPC1ak50>
>
>
>
> I hope this will help.
>
> Mark
>
> Ardmore
>
> NZ
>
> *From:*i erbs <eyera3000@gmail.com>
> *Sent:* Saturday, 30 September 2023 5:08 AM
> *To:* Bob Spidell <bspidell@comcast.net>
> *Cc:* Ahealey help <healeys@autox.team.net>
> *Subject:* Re: [Healeys] Windscreen scratches
>
> I got nothing to loose. Might as well give it a try. BTW, this is on
> my 67B. Those windscreens are spendy to replace
>
> Ira Erbs
> Milwaukie, OR
> 1959 Austin Healey 100-6
> 1967 MGB Roadster
>
> On Fri, Sep 29, 2023, 9:06 AM Bob Spidell <bspidell@comcast.net> wrote:
>
> I used a kit with some sandpaper, a mild abrasive and an
> attachment for a drill to polish my BN2's windshield. IIRC, I got
> it from Eastwood:
>
> https://www.eastwood.com/glass-polishing-kit-for-deep-scratches.html
>
> The 'rule-of-thumb' is if the scratch can be felt with a
> fingernail it can't be removed, but my car had mostly mild wiper
> wear and the kit did the job well enough I can live with it.
>
> Bob
>
> On 9/29/2023 3:41 AM, Robert Markovich via Healeys wrote:
>
> There are some some places that polish windshields. But
> ultimately it may be more cost-effective to simply replace.
> Triplex is the brand to use; an OEM manufacturer that supplied
> them back then. The rest often donâ??t fit right and eventually
> crack from stress points, as Iâ??ve found.
>
> Sent from the all new AOL app for iOS
>
> <https://apps.apple.com/us/app/aol-news-email-weather-video/id646100661>
>
> On Friday, September 29, 2023, 2:01 AM, i erbs
>
> Howdy all
>
> Is there any proven way to remove wiper blade scratches
> from a windscreen?
>
> Thanks all
>
> Ira Erbs
> Milwaukie, OR
> 1959 Austin Healey 100-6
> 1967 MGB Roadster
>
>
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Same with any grinding compound: The components are selected for
their shape, hence 'cutting' ability, hardness, purpose, cost, etc.Â
A compound with large particles with sharp edges will cut deeper and
faster than one with particles of a softer and/or more rounded
shape. The kit I bought came with a paste consisting of rhyolite and
whatever semi-liquid was used to make it a paste; it appears
aluminum oxide is also used. <br>
<br>
A coarser compound will remove deeper scratches, but leave its own
scratches. You can start with a coarser compound to remove larger
scratches, then switch to a finer compound to remove smaller
scratches, and so on; just like you might start rubbing paint--or
filler--with 320grit sandpaper, then 400, then 600, 1200, etc. Some
polishing compounds do that 'automatically,' they start with larger
particles which themselves break down to smaller particles and
successively smooth the surface. McGuiars (sp?) has several
compounds, all graded on a thermometer-like scale for their cutting
(deep) or polishing (fine) characteristics.<br>
<br>
I appears the lapidary (mineral-polishing) crowd has lots of
discussion re: best compounds. Cerium oxide is mentioned a lot,
rhyolite some, but I didn't see any mention of zinc oxide. Zinc is a
soft metal and may not lend itself to being a good polishing
compound, for glass anyway. Cost will (always) be an issue, rhyolite
may be a better compound than cerium oxide but may cost more, or
vice versa.<br>
<br>
bs<br>
<br>
<br>
<div class="moz-cite-prefix">On 9/30/2023 9:46 AM,
<a class="moz-txt-link-abbreviated"
href="mailto:llennep@verizon.net";>llennep@verizon.net</a> wrote:<br>
</div>
<blockquote type="cite"
cite="mid:511687376.7332800.1696092391306@mail.yahoo.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div class="ydpc19107b0yahoo-style-wrap" style="font-family:Arial,
Helvetica, sans-serif;font-size:16px;">
<div dir="ltr" data-setdir="false">What is special about cerium
oxide? Â Why not use zinc oxide?</div>
<div><br>
</div>
</div>
<div id="ydp975197d1yahoo_quoted_6475527098"
class="ydp975197d1yahoo_quoted">
<div style="font-family:'Helvetica Neue', Helvetica, Arial,
sans-serif;font-size:13px;color:#26282a;">
<div> On Saturday, September 30, 2023, 04:20:50 AM EDT, Mark
Donaldson <a class="moz-txt-link-rfc2396E"
href="mailto:ardmorebusiness@xtra.co.nz";><ardmorebusiness@xtra.co.nz></a>
wrote: </div>
<div><br>
</div>
<div><br>
</div>
<div>
<div id="ydp975197d1yiv6310450809">
<div>
<div class="ydp975197d1yiv6310450809WordSection1">
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;">Ira,</span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;">
 </span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;">I
have a spare windscreen with wiper blade â??rainbowâ??
scratches on both sides. To remove them I have
purchased some CERIUM OXIDE to make a paste and
hand-polish them out. </span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;">The
people at the glass company told me the process
will be slow (a lot of elbow grease) but applying
it to a soft rotary pad will speed up the
procedure.</span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;">My
cost equates to about US $15 for 4 ounces. That
amount should do the whole windscreen.</span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;">
 </span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;">Here
is a useful YouTube link:Â Â </span><span
style="font-family:sans-serif;"><a shape="rect"
href="https://youtu.be/4ZJPPC1ak50";
rel="nofollow" target="_blank"
moz-do-not-send="true"><span
style="color:#0563C1;">https://youtu.be/4ZJPPC1ak50</span></a></span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;"> Â </span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;"><br>
</span><span style="font-family:sans-serif;"></span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;"> Â </span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;"> Â </span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><br>
<span
style="font-family:sans-serif;color:#1F497D;">Â Â Â Â Â Â Â Â Â Â </span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;">
 </span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;">
 </span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;">
              </span><span
style="font-family:sans-serif;color:#1F497D;"></span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#003399;">
 </span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#003399;">I
hope this will help.</span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#003399;">
 </span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#003399;">Mark</span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#003399;">Ardmore</span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#003399;">NZ</span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;">
 </span></p>
<p class="ydp975197d1yiv6310450809MsoNormal"><span
style="font-family:sans-serif;color:#1F497D;">
 </span></p>
<div id="ydp975197d1yiv6310450809yqt18608"
class="ydp975197d1yiv6310450809yqt2016400307">
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0cm 0cm 0cm;">
<p class="ydp975197d1yiv6310450809MsoNormal"><b><span
lang="EN-US">From:</span></b><span
lang="EN-US"> i erbs
<a class="moz-txt-link-rfc2396E"
href="mailto:eyera3000@gmail.com";><eyera3000@gmail.com></a> <br
clear="none">
<b>Sent:</b> Saturday, 30 September 2023 5:08
AM<br clear="none">
<b>To:</b> Bob Spidell
<a class="moz-txt-link-rfc2396E"
href="mailto:bspidell@comcast.net";><bspidell@comcast.net></a><br
clear="none">
<b>Cc:</b> Ahealey help
<a class="moz-txt-link-rfc2396E"
href="mailto:healeys@autox.team.net";><healeys@autox.team.net></a><br
clear="none">
<b>Subject:</b> Re: [Healeys] Windscreen
scratches</span></p>
</div>
<p class="ydp975197d1yiv6310450809MsoNormal"> Â </p>
<div>
<p style="margin-bottom:12.0pt;"
class="ydp975197d1yiv6310450809MsoNormal">I got
nothing to loose. Might as well give it a try.
BTW, this is on my 67B. Those windscreens are
spendy to replace </p>
<div>
<p class="ydp975197d1yiv6310450809MsoNormal">Ira
Erbs<br clear="none">
Milwaukie, OR<br clear="none">
1959 Austin Healey 100-6<br clear="none">
1967 MGB Roadster</p>
</div>
</div>
<p class="ydp975197d1yiv6310450809MsoNormal"> Â </p>
<div>
<div>
<p class="ydp975197d1yiv6310450809MsoNormal">On
Fri, Sep 29, 2023, 9:06 AM Bob Spidell <<a
shape="rect"
href="mailto:bspidell@comcast.net";
rel="nofollow" target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">bspidell@comcast.net</a>>
wrote:</p>
</div>
<blockquote style="border:none;border-left:solid
#CCCCCC 1.0pt;padding:0cm 0cm 0cm
6.0pt;margin-left:4.8pt;margin-right:0cm;">
<div>
<p style="margin-bottom:12.0pt;"
class="ydp975197d1yiv6310450809MsoNormal">I
used a kit with some sandpaper, a mild
abrasive and an attachment for a drill to
polish my BN2's windshield. IIRC, I got it
from Eastwood:<br clear="none">
<br clear="none">
<a shape="rect"
href="https://www.eastwood.com/glass-polishing-kit-for-deep-scratches.html";
rel="nofollow" target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">https://www.eastwood.com/glass-polishing-kit-for-deep-scratches.html</a><br
clear="none">
<br clear="none">
The 'rule-of-thumb' is if the scratch can be
felt with a fingernail it can't be removed,
but my car had mostly mild wiper wear and
the kit did the job well enough I can live
with it.<br clear="none">
<br clear="none">
Bob<br clear="none">
<br clear="none">
</p>
<div>
<p class="ydp975197d1yiv6310450809MsoNormal">On
9/29/2023 3:41 AM, Robert Markovich via
Healeys wrote:</p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt;">
<p style="margin-bottom:12.0pt;"
class="ydp975197d1yiv6310450809MsoNormal">There
are some some places that polish
windshields. But ultimately it may be more
cost-effective to simply replace. Triplex
is the brand to use; an OEM manufacturer
that supplied them back then. The rest
often donâ??t fit right and eventually crack
from stress points, as Iâ??ve found. <br
clear="none">
<br clear="none">
</p>
<div>
<p
class="ydp975197d1yiv6310450809MsoNormal"><a
shape="rect"
href="https://apps.apple.com/us/app/aol-news-email-weather-video/id646100661";
rel="nofollow" target="_blank"
moz-do-not-send="true">Sent from the
all new AOL app for iOS</a></p>
</div>
<p class="ydp975197d1yiv6310450809MsoNormal">
 </p>
<p style="margin-top:0cm;"><span
style="font-size:11.5pt;color:#715FFA;">On
Friday, September 29, 2023, 2:01 AM, i
erbs <a shape="rect"
href="mailto:eyera3000@gmail.com";
rel="nofollow" target="_blank"
moz-do-not-send="true"><eyera3000@gmail.com></a>
wrote:</span></p>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt;">
<div
id="ydp975197d1yiv6310450809m_3319096111410648268yiv1571707645">
<div>
<p
class="ydp975197d1yiv6310450809MsoNormal">Howdy
all </p>
<div>
<p
class="ydp975197d1yiv6310450809MsoNormal">Is
there any proven way to remove
wiper blade scratches from a
windscreen?</p>
</div>
<div>
<p style="margin-bottom:12.0pt;"
class="ydp975197d1yiv6310450809MsoNormal">Thanks
all </p>
<div>
<p
class="ydp975197d1yiv6310450809MsoNormal">Ira
Erbs<br clear="none">
Milwaukie, OR<br clear="none">
1959 Austin Healey 100-6<br
clear="none">
1967 MGB Roadster</p>
</div>
</div>
</div>
</div>
<br>
</blockquote>
</blockquote>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<br>
</body>
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