Perspex Boat Windscreens

Submitted: Monday, Nov 05, 2007 at 08:39
ThreadID: 51291 Views:21937 Replies:10 FollowUps:2
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Hi all.

Does anybody know if there is a product availible for restoring clearness in perspex windscreens on boats?
Like most boats with age, perspex windscreens stored outside in the elements have the perspex turn a cloudy/smokey, dull purpley colour which is hard to see through.
Or do i need to replace the windscreen, which would be expensive?
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Reply By: Andrew from Vivid Adventures - Monday, Nov 05, 2007 at 08:42

Monday, Nov 05, 2007 at 08:42
you need to replace it... fundamentally, the way the perspex has deteriorated, there is no way of finishing and the windscreen still being usable (to see through).

And they shouldn't be too expensive.
AnswerID: 270121

Reply By: Johnny boy - Monday, Nov 05, 2007 at 08:57

Monday, Nov 05, 2007 at 08:57
Hi Brian , mate you would be better off going down to your local perspex cutter guy with your old screen and he will trace it onto a new piece then take it home fit it and peel off the protective coating I just did mine down here in SYD and it cost about $50.00 ,having said that if yours is tinted it may cost a little more and the tint might not match the side glass I supose it all depends on how bad the screen is but it is not like glass which means it may not like allot of cleaners so be carefull.

Regards J.B.
AnswerID: 270123

Reply By: David from David and Justine Olsen's 4WD Tag-Along - Monday, Nov 05, 2007 at 09:04

Monday, Nov 05, 2007 at 09:04
When you get your new windscreen made, get somone to make a cover from polarfleece type material. Make it a nice fit over the windscreen. Put this over the screen to protect it from UV and scratches.

Aircraft use acrylic (perspex) canopies and they sit in the sun all the time. Most owners cover the canopies. They are repairable if the damage is not too bad or too deep. There are secial kits made that are very very fine microscopic sandpaper.

I've repaired damage on my aircraft canopy with very fine wet and dry (6000 I think) which leaves it looking badly damaged. I then polish it out with fibreglass polish and brasso, finishing with Plexus spray.
AnswerID: 270124

Reply By: Member - andrew B (Kununurra) - Monday, Nov 05, 2007 at 09:05

Monday, Nov 05, 2007 at 09:05
Gday Brian

I'd be tempted to also get a quote for a glass screen...unless it is bent and not strait. much better to clean and see through, lasts a lot longer and if its a flat pane shouldn't be much more expensive than the plastic

Cheers Andrew
AnswerID: 270125

Reply By: Member -Signman - Monday, Nov 05, 2007 at 09:08

Monday, Nov 05, 2007 at 09:08
It will cost a few bucks more- but if you can get a product called LEXAN (polycarbonate) it will outlast the normal acrylic perspex...
AnswerID: 270127

Reply By: obee - Monday, Nov 05, 2007 at 09:57

Monday, Nov 05, 2007 at 09:57
yeah polycarbonate is the best. It is flexible and durable and wont crack under stress the way perspex does. Its more expensive so you gotta take into account the sort of use it will get and how long you want to keep it.

Owen
AnswerID: 270130

Reply By: Member - Ian W (NSW) - Monday, Nov 05, 2007 at 11:48

Monday, Nov 05, 2007 at 11:48
There are any number of products for "polishing" to remove scratches... Brasso is almost as good as many of the proprietary products.

Once you get that purple/violet tinge you will only remove it by continuous polishing until you wear right through the screen.

Sorry mate! It's a case of put up with it or replace.

Ian
AnswerID: 270138

Reply By: Mr Fawlty - Monday, Nov 05, 2007 at 14:30

Monday, Nov 05, 2007 at 14:30
Me thinks they must have changed the formulation for "perspex"....A mate has a "spitfire" which he flies and it has the original Perspex canopy aand its as good as the day it was made, well sort of... some crazing but that was simply fixed by allowing Chloroform to wick into the cracks and allowing it to "weld" the cracks together then polished with brasso.
AnswerID: 270147

Follow Up By: phil - Monday, Nov 05, 2007 at 16:09

Monday, Nov 05, 2007 at 16:09
When polishing with Brasso make very sure that there is no dirt or other grit or you will leave REAL scratches!

I am intrigued by the fixing of crazing with chloroform. Wonder if it also works to stop cracks radiating out from stress points. The usual way is by drilling a stop hole at the end.
PhilI
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FollowupID: 533159

Follow Up By: David from David and Justine Olsen's 4WD Tag-Along - Monday, Nov 05, 2007 at 17:42

Monday, Nov 05, 2007 at 17:42
chloroform does work, but acrifix is probably a safer option
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FollowupID: 533171

Reply By: Member - michael H (NSW) - Tuesday, Nov 06, 2007 at 12:45

Tuesday, Nov 06, 2007 at 12:45
Hi Brian, I just went through the exercise for a mate with old boat screens, My polycarb supplier suggests 4.5mm polycarb (makrolon)which is UV treated both sides at just under $200.00 a sheet for a 2400 x 1200. My mate only wanted approx 1200 x 600 so has decided to wait until some offcuts become available or settle for plastic/perspex. You could try a polycarbonate roofing supplier or sign shop up your way.

Cheers Michael
AnswerID: 270327

Reply By: Ozboc - Tuesday, Nov 06, 2007 at 13:50

Tuesday, Nov 06, 2007 at 13:50
Ad one of the other posters mentioned - LEXAN is the go - resists turning yellow and other associated effects that standard perspex faces

Also easy to manipulate with a heat gun ( if your handy that is )

Boc

AnswerID: 270341

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