Glass Polishing

Discussion in 'Body Restoration' started by Canadian Barton, Jan 19, 2021.

  1. Canadian Barton

    Canadian Barton Veteran Member

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    Spent about 30 minutes on the glass with cerium oxide paste? And felt pad on my DA. Played around a little bit. Seems to be making some progress but I should look up how to mix this stuff and what speeds I should be polishing at. Couple progress pics.

    started with
    1B9830C9-2CE2-41D8-BFAF-7ABF5E619FF7.jpeg

    First attempt
    3A1FA99F-90BC-476A-9B2F-1E175D298821.jpeg

    Second attempt
    2759466D-85C5-4707-A146-70F38D83EDF5.jpeg

    Not really close to being good but getting better. Will research some more and see where we get too.
     
  2. wpatterson9

    wpatterson9 Member

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    Good progress! Do you have any pics of how deep the scratches were before you started?
     
  3. Bandit723

    Bandit723 Veteran Member

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    Out of my fisher body service manual.

    20210126_075016.jpg 20210126_075035.jpg
     
  4. Canadian Barton

    Canadian Barton Veteran Member

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    Bandit, this is awesome!

    WPatterson, I did not take a picture before I started because I am horrible at documenting things. It was bad, I could catch my nail on them easily. Once I pull the other piece out of storage I will document from the start. This one is my guinea pig.

    I did some more research last night and found some good info. The youtube video below is very similar to the process I've used. I think I'll switch from the DA polisher to my 7" polisher as I don't think the DA is aggressive enough. There was another tip to keep a spray bottle of warm water so you can keep the cerium mixture wet as you go. I think my mix was a little light as well but I didn't want to start to aggressive. I've read 2 parts cerium to 1 part water, I was more 1:2 so I will mix a little heavier.



    I have also purchased some Ceriglass that I forgot about, once I find it I'll give it a try to see how it compares. I'm not sure how aggressive it is and may just be for the final polish step/

    [​IMG]
     
  5. krabben1

    krabben1 Veteran Member Lifetime Gold Member

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    The amount of force and heat it would take to get rid of scratches makes the glass worthless.
     
  6. Canadian Barton

    Canadian Barton Veteran Member

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    I'm not sure where you are getting that info from? Glass is polished all the time but it doesn't weaken it, at least from all the information I have read. In actuality, a scratch on a piece of glass can be called a stress point. Polishing removes the stress point creating a structurally sound piece of glass.
     
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  7. TTR230

    TTR230 Veteran Member

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    I doubt that even aggressive polishing of glass gets it even close to hot enough to do damage. What's the difference between polishing and hot summer sun beating down on the glass? I think auto glass is tempered at something like 600deg?
     
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  8. Zstar

    Zstar Veteran Member

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    CB, that looks great! You are way braver than I am.
     
  9. Tristan65

    Tristan65 New Member

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    Try using a rotary with rayon pad instead of a DA. More efficient but be careful with the temp.
     
  10. Eric

    Eric Veteran Member Lifetime Gold Member

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    I've had good luck with (pre-mixed) cerium oxide past and wool felt pads at low speeds (i.e. using an electric paint buffer with an offset rotation instead of a DA sander)- best example was an old cop car where the wiper blade rubber obviously broke off the bottom half of the frame and of course the constables on board let the wipers operate for hours like this- damage was at the bottom edge in a roughly 6" x 6" area- and was bad- i.e. deepest gouges were almost 1/16". The deep gouges I could only get out about halfway, but everything shallower than this came out with about an hour of polishing (with regular washing off the pad and replenishing the paste).
     
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