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Posted By Discussion Topic: Help/advice needed please

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easyrider
Sep-14-2014 @ 10:03 AM                           Permalink
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Hi all, I've finally got the front window out of my boat but the frame is not in a good state so will be putting new window in using a rubber seal (as in a car windscreen). The worry I've got now is cleaning the grp round the window apperture. What would be the best way of cleaning this without damaging it too much? Thanks for any help/advice you may have

all the best
           Jim
"experientia docet"

rustic
Sep-14-2014 @ 11:02 AM                           Permalink
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Hi Jim, can I assume you don't have this type of window in at the
moment, as you say you are removing the frame.
Personally I would go with refurbishing the frame, if it is in good
condition.

If you go for the rubber seal as in car windscreens, the seal is
available in all sizes.
1 to take the thickness of the glass or perspex/acrylic.
2 to fit in with the thickness of the GRP you are fitting it into.

Now, the GRP lay up thickness will vary around the frame hole, so
you need to take this into consideration when buying the rubber.

I also assume that you may need to open up the hole so you cut out
any fixing holes. Consider also the radius of the corners as there is a
minimum for this type of fitment.
It is also worth buying the proper insert tool for the filler, and after
you have fitted it, leave a few inches of filler sticking out of the frame
for a while as over time, the filler shrinks and you then get a gap.

Fairy liquid can be used as a lubricant  or maybe other water based
lubricants that are safe with rubber... Playful

Edit..
forgot the bit about cleaning the GRP
this is only to get rid of any silicon sealant ...if appropriate.
First I would use a razor blade, taking care as not to cut into the GRP
gel coat.
Leather gardening gloves rubbed along the edge too, or maybe a
pencil eraser.
Meths works well as a solvent BUT AVOID Acetone, (nail varnish
remover), it dissolves the gel coat.

best regards, Richard.

A man who dares to waste one hour
of time has not discovered the value
of life.                       Charles Darwin


This message was edited by rustic on Sep-14-14 @ 11:08 AM

TerryTibbs
Sep-14-2014 @ 11:05 AM                           Permalink
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Is it just dirt ground in Jim, if it is a proprietary boat hull cleaner should suffice, if you need something more aggressive try TCut just remember you have to clean the entire panel to blend in.

Dave Cheers

if it is to be it is up to me!

easyrider
Sep-14-2014 @ 11:10 AM                           Permalink
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Thanks Richard for the advice. The frame, I'm afraid is a no go as it's in a right old state so it will definately be the rubber seal. The problem I have at the moment is cleaning all the old "gunk" around the window. I don't really want to use a metal scraper in case I damage the grp so was wondering if there was anything else that might do the trick

all the best
           Jim
"experientia docet"

easyrider
Sep-14-2014 @ 11:15 AM                           Permalink
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Just seen your edit Richard thanks and cheers Dave

all the best
           Jim
"experientia docet"

essexboy
Sep-14-2014 @ 4:52 PM                           Permalink
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You can buy silicone removed, builders merchants keep I. I have never used it soca t recommend or condem , I just sit on the fence !

George Sims

macroft1
Sep-15-2014 @ 10:36 AM                           Permalink
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I've just replaced the front windows in my Norman 20 footer. It was originally aluminium frames but the previous owner had them replaced with seals and perspex. The seals had perished and the perspex was badly crazed. Mine have a curve in them so it was a little fiddly. Don't make the same mistake I did with the perspex - I tried to do it 5mm acrylic but it was too rigid so when I got it in the seal at one side it would pop out of the other. In the end I had to go with 3mm thick. This was a lot more flexible and was a doddle to fit. Hope this helps. Regards. Mark.

pargeandmarge
Sep-15-2014 @ 7:32 PM                           Permalink
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Hello
We use Farecla g3 scratch remover it is a cutting compound and as you use it the aggregate breaks down and gets finer as you rub to give a fine finish then just polish with a wax all looks good after that.
Kindest regards
Marge and Parge

easyrider
Sep-15-2014 @ 10:06 PM                           Permalink
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Thanks all for replies. I was going to use 4mm perspex instead of the 3mm that was in it but as stated it is a bit too rigid as my window has a curve in it also, so I will be going with the 3mm now. Went to the boat yesterday and got cracking on getting the old "gunk" off. In the end I used a stanley blade and then a bit of sandpaper to smooth it over. There's a bit of light patchwork in places to do but overall it didn't turn out too bad. Now to order the seal so I can get the new window fitted as she's looking a bit sorry for herself at the moment. Will let you know how it all goes with maybe a photo


  

all the best
           Jim
"experientia docet"

rustic
Sep-15-2014 @ 10:19 PM                           Permalink
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If I recall, you start the main rubber seal with the joint in the middle at the top, and the filler, you start with the filler in the middle at the bottom. As I said before, allow a few inches sticking out as it will shrink a little. Then later you can trim and push in.

Don't forget the rubber can be bought with different sizes, one for the perspex, and one for the GRP.

Years ago I fitted a couple of side windows like this into a Land Rover rear panels, and also fitted a mini windscreen.
Some people use a length of string to fit in the channel to enable the perspex to be fitted. If it was glass, there is a greater risk of cut fingers, so can also be a problem with perspex, so wear suitable gloves.
I guess there must be some YouTube videos on this.



best regards, Richard.

A man who dares to waste one hour
of time has not discovered the value
of life.                       Charles Darwin

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