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  1. #11
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    Re: Polishing Lexan Boat Windows

    I realize this is an old thread, but I have a similar question regarding improving clarity of windows on an old boat.

    I am guessing the material is Lexan, but I don't know how to tell whether they are Lexan or Acrylic. The boat was built in the early '70s by a small boat yard on the Solent in England, and they are long, long gone. And even if I could contact them, the windows on the boat now aren't the original anyway. I do have contact information for the previous owner who replaced the windows (probably about 10 years ago), but the gentleman is getting on in years now, and I don't think he will be able to provide me with any useful information on the materials he used.

    So, I have to work with what I have and what I know. What I have is four large tinted windows that are scratched and hazy. I can tolerate some scratches, and I'm not too concerned with appearance, but I do care about being able to see through the windows.

    My plan is to apply "Meguiar's G12310 PlastX Clear Plastic Cleaner & Polish" and then follow up with "Majic Headlight Lens Cleaner & Sealant" for UV protection.

    I'll try that on one window, or just a small area of one window to see if it works. I'm afraid I'm going to find that I need something more aggressive, but we will see. I considered taking down a layer with M105 and then M205, before the PlastX product, but it seems that might not be a good idea for Lexan.

    Any suggestions?

  2. #12
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    Thumbs down Re: Polishing Lexan Boat Windows

    Quote Originally Posted by foo View Post
    I realize this is an old thread, but I have a similar question regarding improving clarity of windows on an old boat.

    I am guessing the material is Lexan, but I don't know how to tell whether they are Lexan or Acrylic. The boat was built in the early '70s by a small boat yard on the Solent in England, and they are long, long gone. And even if I could contact them, the windows on the boat now aren't the original anyway. I do have contact information for the previous owner who replaced the windows (probably about 10 years ago), but the gentleman is getting on in years now, and I don't think he will be able to provide me with any useful information on the materials he used.

    So, I have to work with what I have and what I know. What I have is four large tinted windows that are scratched and hazy. I can tolerate some scratches, and I'm not too concerned with appearance, but I do care about being able to see through the windows.

    My plan is to apply "Meguiar's G12310 PlastX Clear Plastic Cleaner & Polish" and then follow up with "Majic Headlight Lens Cleaner & Sealant" for UV protection.

    I'll try that on one window, or just a small area of one window to see if it works. I'm afraid I'm going to find that I need something more aggressive, but we will see. I considered taking down a layer with M105 and then M205, before the PlastX product, but it seems that might not be a good idea for Lexan.

    Any suggestions?
    I would not use anything abrasive on the windows. The plastX ruined my windows. Every year since the plastX was used tiny little cracks appeared in all my windows. The cracks look like stress cracks, but are not. Apparently something in the plastX attacked the plastic and degraded it. Now I am faced with removing all the windows and having new ones built. My windows are Lexan MR10. A neighbor has the same exact boat as mine, even the same year. He did not use plastX and his windows still look fine.

    I am very upset with Meguiar for not answering my question properly or putting a warning on the product not to use on Lexan. Now I am faced with having to spend thousands of dollars to have new custom windows built, the mfg. of my boat is out of business. I will never use a Meguiar product again.

  3. #13
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    Re: Polishing Lexan Boat Windows

    Quote Originally Posted by Starrider View Post
    ...The plastX ruined my windows. Every year since the plastX was used tiny little cracks appeared in all my windows. The cracks look like stress cracks, but are not. Apparently something in the plastX attacked the plastic and degraded it.,, My windows are Lexan MR10...
    That's a little worrying. However, a little hunting on-line indicates that the "MR" in "Lexan MR10" stands for "Mar Resistant" lexan that has a coating on both sides. My guess is that the PlastX product damaged the coating, which is what is causing your problem. If you are facing complete replacement of all the windows, you may want to first try a last-ditch effort of really sanding them down, taking off the coating completely. Might not work, but perhaps worth a try before replacement.

    In my case, I was able to find pictures that the previous owner took when he installed the windows. They are "markolon" polycarbonate. I can't be sure, but I think they do not have an abrasion-resistant coating on them. So I'm still thinking of giving the PlastX a try, starting with a small area.

  4. #14
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    Re: Polishing Lexan Boat Windows

    Quote Originally Posted by Starrider View Post
    I would not use anything abrasive on the windows. The plastX ruined my windows. Every year since the plastX was used tiny little cracks appeared in all my windows. The cracks look like stress cracks, but are not. Apparently something in the plastX attacked the plastic and degraded it. Now I am faced with removing all the windows and having new ones built. My windows are Lexan MR10. A neighbor has the same exact boat as mine, even the same year. He did not use plastX and his windows still look fine.

    I am very upset with Meguiar for not answering my question properly or putting a warning on the product not to use on Lexan. Now I am faced with having to spend thousands of dollars to have new custom windows built, the mfg. of my boat is out of business. I will never use a Meguiar product again.
    Sorry to hear about your trouble here. Have you contacted our Solutions Hub for assistance? They can be reached at 800-347-5700 or customercare@meguiars.com. Also, MOL member foo, below, seems to be on to something here regarding your windows having a protective coating, and the PlastX affecting the coating. The PlastX may have started to remove the coating, but it will typically not have the ability to fully remove a coating on any sort of clear plastic. We invite you to please contact our Solutions Hub so we can have a rep work one on one with you to look into this. We would agree with foo, that is may take sanding to fully remove coating, but would not know until investigating.

    Quote Originally Posted by foo View Post
    That's a little worrying. However, a little hunting on-line indicates that the "MR" in "Lexan MR10" stands for "Mar Resistant" lexan that has a coating on both sides. My guess is that the PlastX product damaged the coating, which is what is causing your problem. If you are facing complete replacement of all the windows, you may want to first try a last-ditch effort of really sanding them down, taking off the coating completely. Might not work, but perhaps worth a try before replacement.

    In my case, I was able to find pictures that the previous owner took when he installed the windows. They are "markolon" polycarbonate. I can't be sure, but I think they do not have an abrasion-resistant coating on them. So I'm still thinking of giving the PlastX a try, starting with a small area.
    Hi foo,

    Your process sounds great, as long as the windows are an un-coated material. Are you planning on working by hand or machine?

    Please feel free to post further questions / keep us updated.

    Nick
    Nick Winn
    Product & Training Specialist | Meguiar's Online Forum Administrator
    Meguiar's Inc.
    Irvine, CA
    nawinn@meguiars.com
    800-854-8073 ext 3845

    CLICK HERE TO REGISTER AS A MEMBER FOR MEGUIAR'S ONLINE DISCUSSION FORUM

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