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Removing "haze" from plexiglass windshield

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  • Removing "haze" from plexiglass windshield

    I am in the process of fixing up a 1965 17' Starcraft. It has a plexiglass "bowed" windshied that is pretty foggy to look through. It also has some hairline stress cracks along the bends to the sides of the boat. Does anybody know of any way (or cleaner/solvent), that will solve either of these problems? I have tried nothing on the cracks. As for the haze, I have tried common things like windex, alcohol, purple power, etc. There has to be some kind of good cleaner out there...Thanks in advance!


  • #2
    Re: Removing "haze" from plexiglass windshield

    As far as I know, there is no cure for fogged plexiglass. Maybe someone may know some magic cure, but you may have to replace, as you said you have some cracks starting.

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    • #3
      Re: Removing "haze" from plexiglass windshield

      That's what I was affraid I would hear. I can only expect that molded plexiglass like that would be very expensive as well...let alone hard to find!The cracks are just "flakes". They are simply surface cracks. I'm thinking some eye-glass scratch repairer, or fish tank scratch repairer would fix that. I am more worried about getting rid of the fogging! It isn't bad as long as the sun is out, but it is hard to see through on nasty days.

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      • #4
        Re: Removing "haze" from plexiglass windshield

        Search this site for windshields. Some people are able to make their own. It involves getting a large enough sheet of plexiglass (any hardware store) and bending it with a heat gun.

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        • #5
          Re: Removing "haze" from plexiglass windshield

          Make a new windshield from polycarbonate, it bends cold and doesn't crack or craze, but be sure to get "scratch resistant" material as the normal stuff scratches rather easily, you'll probably need to go to a specialist plastic supplier to get this, it's not the sort of stuff that a normal hardware store would stock.Try companies that make display cases, they often use this material and will most likely sell you a piece the size you need rather than a full sheet.

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          • #6
            Re: Removing "haze" from plexiglass windshield

            Hey, PCM. If the fogging is only on the surface, from abrasion, you can take it out in three steps:1. Sand the surface with #800 wetordry paper, wet.2. Power buff with rubbing compound.3. Hand polish with a suitable plexi polish.If the fog is actually discoloration in the plastic you gotta replace it.Good luck.
            sigpic

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            • #7
              Re: Removing "haze" from plexiglass windshield

              Like Petrolhead said. I did it. If you are the slightest bit handy, have a jig or saber saw, it is a rather easy and inexpensive job. Here is mine during the trial fitting stages after cutting and installing the polycarbonate and re-using the rubber deck gasket:
              sigpic 1985 Bayliner 1600 Capri Cuddy, 1965 MFG Niagara Custom. >> MFG Video<<. >> MFG Project<< >>Bayliner Hard Top Project<< >>Bayliner Repower Project<<

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              • #8
                Re: Removing &quot;haze&quot; from plexiglass windshield

                There is a coating on the market for eyeglasses that have crazed finishes.You would need an aweful lot of it to do a windshield but it may work.You need to watch TV late at night and you will see an infomercial on it.Charlie

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                • #9
                  Re: Removing &quot;haze&quot; from plexiglass windshield

                  Look for polish called "Novus" or "Meguires PlastX". Depending on the severity of your cloudiness, you may be able to bring the original windshield back to life.As an example, wetsanding and polishing my headlights with PlastX I was able to restore the headlights on my old van. I have since used PlastX on my boat windshield to keep it in good condition.Click to see image (39kb)
                  '86 SeaRay Seville 195BR c/w Mercruiser 170
                  '72 Glastron GT160 & 1985 Merc 150HP V6 Outboard
                  Project Status: http://forums.iboats.com/forum/boat-...lastron-gt160
                  The Merc Nut

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                  • #10
                    Re: Removing &quot;haze&quot; from plexiglass windshield

                    Look at some of the aviation supply houses for a product called MicroMesh. I have saved lots of aircraft windshields with this stuff. The kit has a foam sanding block and padded "sandpaper" ranging from 1000 grit to about 10,000 grit. You do lots of water sanding. If it is only surface abrasions this might work. It won't quite make it look new but it will be pretty darn close. Making a new one is best but if that is not an option you might give it a try.Russ In Texas

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                    • #11
                      Re: Removing &quot;haze&quot; from plexiglass windshield

                      Thanks for all the help. With winter coming up, it should be a good time to mess with the polycarnonate idea. Maybe I will pull out the jig saw and test my handy skills. :-) Isn't that stuff kinda pricey though?One of these days I will update my website and put up pictures of this project. For never working on boats before, I've become pretty proud of it. I owe this site many thanks!

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                      • #12
                        Re: Removing &quot;haze&quot; from plexiglass windshield

                        Just a quick comment. I was reading somewhere last week (can't re-find the site, sorry), that both ammonia and alcohol type cleaners ...including Windex... are very bad for Plexiglas and in fact cause most of the fogging and crazing. Apparently, some of it is caused by UV light as well. The site I was reading said to never use ANYTHING but water to clean Plexiglas.Barely $0.02 worth,Joe

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                        • #13
                          Re: Removing &quot;haze&quot; from plexiglass windshield

                          I've used the novus brand with mixed results, overall not too bad.Maybe this: http://www.convertiblecar.com/instructs/instr_pwp.html Aldo
                          Watch this space......................

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                          • #14
                            Re: Removing &quot;haze&quot; from plexiglass windshield

                            Vapor Polishing....If you look it up you will find some info on it. Im not sure how they do it, but I have had it done on small items and it works great...

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                            • #15
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                              Re: Removing &quot;haze&quot; from plexiglass windshield

                              Originally posted by PCM: I am in the process of fixing up a 1965 17' Starcraft. It has a plexiglass "bowed" windshied that is pretty foggy to look through. It also has some hairline stress cracks along the bends to the sides of the boat. Does anybody know of any way (or cleaner/solvent), that will solve either of these problems? I have tried nothing on the cracks. As for the haze, I have tried common things like windex, alcohol, purple power, etc. There has to be some kind of good cleaner out there...Thanks in advance!

                              Comment


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