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Goodwood
by waikiore - 19/09/26 02:50 PM
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Jun 14th, 2026
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I've had this issue right from the start on my Roadster. The perspex mists up in the cold garage, and also out on the road in cold weather. Three of the four pieces of perspex do this. The rear offside - in the photo - remains clear. When the sun comes out, or by using a hairdryer, the mist disperses. We concluded after an earlier post that this is micro water droplets which are being attracted to the perspex, but we don't understand why. The most effective blocker so far has been Autoglym tar remover. This suppresses the misting for a week or two. I haven't given up and will try other products over time. This is today - a miserable wet day with the temperature hovering around 1 degree C. 
DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
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Talk Morgan Regular
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Talk Morgan Regular
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Hello DaveW,
I have the same problem, but only one of the four pieces of perspex do this.
Material defect ?
Last edited by Jens; 17/12/17 07:30 PM.
2003 Morgan 4/4 2-seater
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Certainly a material difference Jens. If you look closely there's a coating. but why some mist over and some don't remains a mystery.
DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
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Wave & smile... It's a Morgan Member of the Inner Circle
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Spooky
Is one sheet polycarbonate and one acrylic ?
2008 XXVII Platform, Bugatti Blue Roadster 4 Seater
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Just barreling along Needs to Get Out More!
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Just barreling along Needs to Get Out More!
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Have you tried a really gentle 'cutting agent' like the ones for soft top window scratch removal ?
Jon M
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Yes I've tried all cutting pastes including Meguiars perspex cleaner. The best by far so far is tar remover...........
DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
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Rainex? We used to use it on both sides of motorcycle helmet visors.
Peter ![[Linked Image]](http://bradley.it/public_images/drive.jpg)
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Talk Morgan Regular
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Could it be possible that the ones that are misting up are put in the inside out? I seem to remember that perspex is "coated" on one side.
Dirk
1993 Morgan +4 (Connaught Green)
2009 Mini Cooper D
2024 Mercedes GLC
1994 Ford Motorhome
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Take the roof down-problem solved! 
Gerry
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Rain-ex doesn't work. Visor anti mist doesn't work for long. It mists both sides and is worse with the roof down.
Changing the perspex may be the only cure.
DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
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