How to remove scratches from glass - Team Camaro Tech
Tips & Tricks Member submited how-to's

LinkBack Thread Tools Display Modes
post #1 of 11 (permalink) Old Oct 18th, 14, 06:15 PM Thread Starter
Gold Lifetime Member
67restoproj's Avatar
Join Date: Feb 2007
Location: Langley, BC. Canada
Posts: 895
How to remove scratches from glass

Has anyone had success in removing heavy scratches from door glass? Just looking for an alternative other than replacing. Ive seen toothpaste, but I cant see it being too effective.

1969 Camaro X77 Z/28 Lemans Blue
1991 Camaro z28 1LE-R7U #58 Players Challenge
67restoproj is offline  
Sponsored Links
post #2 of 11 (permalink) Old Oct 18th, 14, 07:03 PM
Gold Lifetime Member
Join Date: Dec 2004
Location: Oklahoma City
Posts: 3,078
Re: How to remove scratches from glass

It can be done, but if they are deep, you will distort the glass surface so badly, it may look better with scratches.

Best thing to remove light scratches is cerium oxide. Make a paste with water and go to work. Lots of rubbing.

bilodeaulynn is offline  
post #3 of 11 (permalink) Old Oct 18th, 14, 07:08 PM
Gold Lifetime Member
69z28freak's Avatar
Join Date: Jan 2006
Location: Vancouver, BC, Canada
Posts: 6,345
Re: How to remove scratches from glass

Hey Pat Lloyd polished his glass. It was badly scratched and now it looks like new. I am going to polish mine this winter. It is similar to paint polishing. I think he posted the process. Either way he is hip to the process and it works great.

Grandma, 69.5, Z/28 Finally Done! Well almost...

My Build Thread

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
69z28freak is offline  
post #4 of 11 (permalink) Old Oct 18th, 14, 11:57 PM
Gold Lifetime Member
Join Date: Jul 2002
Location: Las Vegas, NV.
Posts: 1,109
Re: How to remove scratches from glass

Originally Posted by bilodeaulynn View Post
Best thing to remove light scratches is cerium oxide. Make a paste with water and go to work. Lots of rubbing.
X2!!! Great advise. Rubbing compound applied with cork has saved me a time or two as well.

It takes a fool or an idiot to first criticize! It takes a wise and intelligent man to first ask why!

1969 coupe under going restification (Almost Done!)
RSS is offline  
post #5 of 11 (permalink) Old Oct 19th, 14, 05:04 AM
Senior Tech
Join Date: Sep 1998
Location: Ontario, Canada
Posts: 2,009
Re: How to remove scratches from glass

If you can feel it with your finger nail then forget it. Otherwise jewelers rouge will remove small scratches.

Mark 70 Z28 M22 3.73 Z21 Z87 - Lunati 20120121 Roller Cam

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
COPO is offline  
post #6 of 11 (permalink) Old May 18th, 15, 12:46 PM
Join Date: May 2015
Location: ZA
Posts: 7
Re: How to remove scratches from glass

It depends how deep the scratch is, there are some abrasive techniques you could use to "sand" it down and then polish it with a buffer but there is no guarantee that this endeavor will be successful.
AdamC is offline  
post #7 of 11 (permalink) Old Jun 3rd, 15, 05:14 PM
Senior Tech
Join Date: Aug 2014
Location: Pennsylvania
Posts: 271
Re: How to remove scratches from glass

Don't waste your money on those kits with cerium oxide, they don't work.

67 RS/SS 350, M21, 3:70 POSI, Hooker side mount headers, blue dot tail lights. owner since 1974.
327fuelinjected is offline  
post #8 of 11 (permalink) Old Jun 3rd, 15, 06:39 PM
Senior Tech
Join Date: Feb 2013
Location: Southern NH
Posts: 2,457
Re: How to remove scratches from glass

I had door glass that apparently was left in the door in the rolled down position when the door was media blasted at some point earlier in it's life. The hole where the key cylinder was removed from in each door did a number on the glass about the size of a nickle (apparently the dummy that media blasted didn't think to cover the hole!). I ordered a cerium oxide polishing kit with a polishing pad that was about 6" in diameter but found it was way too large a diameter to remove glass damage like I had. Rather than give up, I tried a number of things and eventually came up with a process that worked very well. Believe me, the media blasted portion of the glass went far deeper than any scrape or scratch in glass I've ever seen. Both of my doors window glass had this problem, one of them I've done, the other I will soon do and will take photos with a step by step of the process and then post on this forum. Until then, here is a description of what I learned/did.

1. First off the cerium oxide by itself wasn't aggressive enough for my glass damage, so I purchased a small 2" or 3" diameter hard plastic disc with arbor that I could mount in my drill. Then I cut a number of sanding discs out of various grits of wet sand paper from 220 grit all the way up to 2000 grit. I attached the wet sand paper cut-outs (one at a time) to the plastic disc and arbor with masking tape rolled into 360 degree loops with the sticky side out.

2. I placed some damp sponges at the bottom of the glass along the top edge of the door where the felts are to create a barrier and absorb any water and sanding/polishing slurry that ran down the door glass while I was sanding and later polishing. Much easier to do this than to later deal with the mess that can get down into your door and on your felts. Remove these sponges every so often and rinse them in a pail of clean water. You could probably also use a towel folded the long way a few times if it would stay in place, the sponges worked out just fine.

3. I wet sanded the glass damage and moved progressively through each grit. The more coarse grits take less time to do their task, half the battle is determining when to move on to the next finer grit. Use a lot of water with a bit of detergent mixed in for lubrication and clean the glass often with a clean damp sponge. In my situation, I could see and feel the texture of the media blasted glass damage getting smoother. With each finer grit I moved to, I would sand a larger and larger area of the glass to make a feathered transition from the nickle sized blasting damage out to a larger diameter so the distortion in the glass would be less. Of course as the area being sanded gets larger and larger, the sanding does take longer and longer as you are covering a much bigger area.

4. Once you think you have sanded the glass all the way up to the 2000 grit and have the glass flat and smooth (relatively speaking), it's time to move on to the cerium oxide polishing. The best type of polishing pad to use with cerium oxide is a felt pad, but the one that came in my polishing kit was far too large a diameter for what I needed to do. I needed to be able to polish a smaller area like I had done with the power wet sanding. I purchased some some self adhesive 2" or 3" felt furniture feet and used them as buffing pads on the same hard plastic disc and arbor setup. They don't wear out very fast which was very surprising to me.

5. Mix the cerium oxide powder with water into a slurry, dampen the felt pad with some water first, then put a small amount of the cerium oxide slurry on the pad and start buffing the glass. It takes some speed and pressure of the buffing for the polishing to work best, if the glass and/or pad start to dry out, you either need more cerium oxide slurry on the pad/glass, or if there is still dried up cerium oxide on the pad, take a spray bottle of water and dampen the felt pad with it and even spray the glass in the area you are working. You don't want to polish so fast or use so much pressure that the glass gets hot. Feel the other side of the glass occasionally to see if it is getting hot and if so, modify your process to reduce the heat buildup.

6. You may find after using the cerium oxide and felt polishing pad for a while that the glass is still to rough and needs further wet sanding. This happened to me until I gained some experience and skills with the process. If this happens, just go back to the wet sanding operation for a bit longer and then move ahead with the process. I believe I had to go back and repeat grits 1000, 1500 & 2000 at least one or two extra times before the cerium oxide polishing gave me the results I was looking for. The 2000 grit you will need to use much more than the 1500 grit. Likewise the 1500 grit you will need to use much more than the 1000 grit, and so on down the various grits of paper. The 2000 grit by itself will polish the glass to some extent if you use it long enough, then the cerium oxide polishing finishes it off.

Notes: How course of a grit wet sand paper you begin with depends on the damage you are trying to repair. Experiment with a finer grit first and if it's not cutting the glass fast enough, step down to the next courser grit paper. I was able to get my first piece of glass so the original damaged area looks better then the rest of the original glass. It does take time and effort. I've polished everything from paint, to aluminum, and stainless trim. They are all much faster and easier to polish than glass is, glass is a really hard material. If you've tried polishing any of these surfaces in the past and decided you and polishing don't get along, you probably don't want to try and repair glass damage. But glass damage can be polished out with the proper materials, care, time and effort. Hopefully this helps anyone that really wants to remove damage from glass.

69 Camaro Z/28 RS, original Azure Turquoise, M21 & 3.73 12-bolt posi. NOM 406ci, AFR 210 heads, Straub hyd. roller cam & Dynatech 1-3/4" > 1-7/8" headers, QuickFuel 750 Annular. Photos at:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
NH69Z28RS is offline  
post #9 of 11 (permalink) Old Jun 3rd, 15, 06:49 PM
Team Member
Join Date: Dec 2009
Location: OKC, OK
Posts: 80
Re: How to remove scratches from glass

I did mine with the same stuff I cut/buff'd the clear coat- 1000, 1500, 2000, 3000, then used the polishing paste and buffer. Looks good--not new (it's 47 years old), but good.


Buckets and piles of a 1968 SS Conv 396
-piles are getting smaller, and it started !
- got the paint on, interior is next.
- interior is about done, it's cruise'able !
- down to top,windows and a few little pieces and it's done
Muletime is offline  
post #10 of 11 (permalink) Old Jun 3rd, 15, 08:44 PM
Gold Lifetime Member
69Z28-RS's Avatar
Join Date: Aug 2008
Location: Huntsville, AL area
Posts: 1,496
Re: How to remove scratches from glass

One additional thought re polishing scratches, etc from the glass. If you use a drill, or any higher speed motor aid for the polishing, you will generate quite a bit of heat which can very easily crack the thin glass used in the laminated windshield, whereas the side/back glass is thicker and *tempered* and might be a bit more resistant to the heat generated from the process...

Corvettes (5), Nomads (2), El Camino, etc
69Z28-RS is offline  
post #11 of 11 (permalink) Old Jun 9th, 15, 10:09 AM
Gold Lifetime Member
67RSSS's Avatar
Join Date: Apr 1999
Location: Vancouver Island, Canada
Posts: 721
Re: How to remove scratches from glass

A tip for those with wiper blade marks on their glass that obviously are not deep as the OP. Try using a clay bar that you use on you paint as it does a great job! Having a used a razor blade, vinegar and water , and other solutions nothing worked. Decided to try my clay bar on the glass as i was claying my car and glass is as good as new.!

67 RSSS Van Nuys, 4th week Sept,1966
ps,tilt,headrest,spd warn,pw,am/fm,delux int,
remote mirror,rear defrost,tint glass.etc...
TKO 600 Extreme,12bolt 3:73 gears.
67RSSS is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome