I have used the Novus Plastic Scratch Remover and Polish with great success. I
applied it as per the directions and by "HAND" not a machine. Windows are very
clear and no problems with light diffusion. My top is now 12 years old and the
car was my daily driver for 9 of those years
Terry
74 TR6 - CF19874
75 TR6 - CF31171(Parts Car)
Aribert_Neumann@magna.on.ca wrote:
> With regard to plastic polish - are you referring to the Novus brand? I
> would be very wary of using anything on new plastic windows. Once you
> notice slight fogging, the window is degrading and you have less to loose
> and more to gain by trying to remove any fog.
>
> I have used Novus #1 and #2 with questionable results. After 5 years of
> keeping the windows clean (frequent washings) I noticed the beginnings of
> fogging. I used the polish with a right angle die grinder with a 3 in dia.
> lambswool pad using the grinder at low air pressure (low rotational speed
> to avoid overheating the plastic locally and smearing the surface). The
> results were a more clear window. This past fall I was able to drive the
> car into mid December due to the winter snows coming late. When the sun
> was low on the horizon it was very difficult to see out of the window
> because the light was diffracting (starburst pattern). I suspect this was
> caused by the polishing of the window modified the surface of the plastic.
> This was not apparent when it was cloudy or the sun was higher in the sky.
> Headlights caused the same condition.
>
> FWIW, I work in the convertible/soft top end of the auto industry. About
> 10 years ago one of the major suppliers of plastic rear windows developed a
> scratch coating for plastic windows. The product passed all of the
> laboratory testing and when we sewed the window material into a prototype
> top for vehicle evaluation the night optics (headlights from behind caused
> the light to diffract) were so bad that the concept of a scratch coating
> was abandoned
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