Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 21-08-2015, 00:38   #1
Senior Cruiser
 
Kenomac's Avatar

Cruisers Forum Supporter

Join Date: Jan 2012
Location: Somewhere in the Mediterranean
Boat: Oyster 53 Cutter
Posts: 6,512
Lewmar Hatch Crazed Finish Repair

We have a couple of overhead Lewmar hatch covers made of plexiglass or Lexan that have developed a crazed finish over the years. Is there a product that will remove the small scratches and restore the finish? Presently, it's like looking through a shattered window, but the hatch covers are working just fine... no leaks.

I have several 3M boat polishing products onboard, will these products along with some boat wax restore the finish?

Thanks for the help.

Ken
Attached Thumbnails
Click image for larger version

Name:	image.jpg
Views:	261
Size:	429.9 KB
ID:	107688  
__________________

__________________
Kenomac is offline   Reply With Quote
Old 21-08-2015, 01:16   #2
Registered User
 
Delancey's Avatar

Join Date: Oct 2011
Location: nondum cognita
Boat: sailboat
Posts: 3,173
Re: Lewmar Hatch Crazed Finish Repair

Ken, short answer no. The Lewmar spec material is acrylic. Looks like you have Lewmar Ocean series, replacements should be available without the frame that mounts to the deck.

I have Lewmar Super Hatches which are out of production and a different size than the Ocean series so I replaced them myself, you can read below.

In the states a company called Select Plastics does replacement of just the lens itself for about the same cost as replacing with new but they make you wait six weeks. Meantime you have a hole in your deck that needs to be covered.

Hope this helps.

Lewmar Superhatch lens replacement

Selectplastics | Selectplastics
Attached Thumbnails
Click image for larger version

Name:	image.jpg
Views:	193
Size:	402.6 KB
ID:	107689  
__________________

__________________
Delancey is offline   Reply With Quote
Old 21-08-2015, 08:00   #3
Senior Cruiser

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Nevada City. CA
Boat: Sceptre 41 Ohana
Posts: 3,705
Images: 9
Re: Lewmar Hatch Crazed Finish Repair

Ken there was a real good plastics shop in Caligari. Don't know about Olbia. They shut down in August though. Bring in the old and the next day they gave me a new one. In Europe I recommend using Silaflex product to seal. Make sure to use the Primer. Sorry dont remember the number but 291 comes to mind. When I did it I taped every edge with blue masking tape over hung the edges then cut with a razor knife. came out really nice. I think the price for one hatch and four portlights was Euro 50. Got it done in a couple hours while enjoying a beer.
__________________
Fair Winds,

Charlie

Between us there was, as I have already said somewhere, the bond of the sea. Besides holding our hearts together through long periods of separation, it had the effect of making us tolerant of each other's yarns -- and even convictions. Heart of Darkness
Joseph Conrad
Charlie is offline   Reply With Quote
Old 21-08-2015, 08:32   #4
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 14,021
Re: Lewmar Hatch Crazed Finish Repair

The crazing is internal, it can't be polished out.
After you replace them, consider having some sunbrella covers made to keep the UV from ruining them when you not on the boat. My covers are insulated and keeping the sun out really helps the AC when we are in a Marina plugged into shore power, plus I hope will add life to the Acrylic
__________________
a64pilot is offline   Reply With Quote
Old 21-08-2015, 08:59   #5
Registered User

Join Date: Feb 2015
Posts: 370
Re: Lewmar Hatch Crazed Finish Repair

I replaced mine with laminated safety glass. Came out crystal clear!
__________________
sailnow2011 is offline   Reply With Quote
Old 21-08-2015, 09:20   #6
Moderator
 
cabo_sailor's Avatar

Cruisers Forum Supporter

Join Date: Mar 2008
Location: Tarpon Springs FL
Boat: Cabo Rico 38
Posts: 1,830
Re: Lewmar Hatch Crazed Finish Repair

A lot of the time the crazing can be caused by using glass cleaner. That's a no no 😡

I had the same problem on my first boat. The only solution was to have a local plastics shop build me new ones. They did a terrific job and allowed me to change from clear to smoked, for all that FL sunshine.

Rich


Sent from my iPhone using Cruisers Sailing Forum
__________________
cabo_sailor is offline   Reply With Quote
Old 21-08-2015, 10:09   #7
Registered User
 
travellerw's Avatar

Join Date: Jan 2014
Location: Antigua
Boat: Fortuna Island Spirit 40
Posts: 1,505
Re: Lewmar Hatch Crazed Finish Repair

I very much disagree with the posts here. The crazing is on the outside layer of the Acrylic and is no more than 1mm deep (yes it looks deeper).

If you are willing to do the work, you can bring them back to factory look. Its exactly like polishing and sanding gelcoat. Start with 220 grit WET and sand. Use water and light to determine when you have sanded low enough to remove the crazing (careful, 220 will remove material fast). Then move to 400, 600, 800, 1200, 1500 and polishing compound. What do you have to loose? This process is used in the airline industry all the time!

I had a C80 chartplotter that looked exactly like you hatch. I was able to polish all the crazing out and the screen looks like new now (although the anti-glare coating is gone).
__________________
travellerw is offline   Reply With Quote
Old 21-08-2015, 10:15   #8
Registered User
 
travellerw's Avatar

Join Date: Jan 2014
Location: Antigua
Boat: Fortuna Island Spirit 40
Posts: 1,505
Re: Lewmar Hatch Crazed Finish Repair

Unfortunately I don't have a better pic, or a before pic, but here is the plotter after polishing. The screen was almost unreadable before I polished it.
Attached Thumbnails
Click image for larger version

Name:	polished.jpg
Views:	166
Size:	158.8 KB
ID:	107716  
__________________
travellerw is offline   Reply With Quote
Old 21-08-2015, 10:58   #9
Senior Cruiser
 
Opie91's Avatar

Join Date: Apr 2009
Location: CT
Boat: C&C 34
Posts: 779
Re: Lewmar Hatch Crazed Finish Repair

Ken,
Try one of these kits. We use them on aircraft windows. Work great as long as you have some time to kill.

http://www.chiefaircraft.com/mm-kr70.html

Keep it wet all the time.
__________________
Opie91 is offline   Reply With Quote
Old 21-08-2015, 11:05   #10
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 18,169
Re: Lewmar Hatch Crazed Finish Repair

My Son in law owns an aircraft window repair facility. I forget what they use to polish windows but it works like a charm. Aircraft owners pay big bucks to get it done as the windows are super expensive. Cesium oxide?
But frankly, just replacing is a good option.
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is offline   Reply With Quote
Old 21-08-2015, 11:22   #11
Senior Cruiser
 
Kenomac's Avatar

Cruisers Forum Supporter

Join Date: Jan 2012
Location: Somewhere in the Mediterranean
Boat: Oyster 53 Cutter
Posts: 6,512
Re: Lewmar Hatch Crazed Finish Repair

I'm going to try polishing one of them just like when I did the hull a couple of months ago. Sand paper then polishing compound, and see how it turns out. How can I harm them? They're already dead... Kinda like doing CPR on a dead guy... Really, I can't hurt them.
__________________
Kenomac is offline   Reply With Quote
Old 21-08-2015, 11:32   #12
Senior Cruiser

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Nevada City. CA
Boat: Sceptre 41 Ohana
Posts: 3,705
Images: 9
Re: Lewmar Hatch Crazed Finish Repair

How about some before and after photos Ken.
__________________
Fair Winds,

Charlie

Between us there was, as I have already said somewhere, the bond of the sea. Besides holding our hearts together through long periods of separation, it had the effect of making us tolerant of each other's yarns -- and even convictions. Heart of Darkness
Joseph Conrad
Charlie is offline   Reply With Quote
Old 21-08-2015, 11:34   #13
Senior Cruiser
 
Opie91's Avatar

Join Date: Apr 2009
Location: CT
Boat: C&C 34
Posts: 779
Re: Lewmar Hatch Crazed Finish Repair

Quote:
Originally Posted by Kenomac View Post
I'm going to try polishing one of them just like when I did the hull a couple of months ago. Sand paper then polishing compound, and see how it turns out. How can I harm them? They're already dead... Kinda like doing CPR on a dead guy... Really, I can't hurt them.

The kit above comes with all the paper and will last several hatches. Just clean the paper when your done. I have polished scratches out of gorilla glass with it.
__________________
Opie91 is offline   Reply With Quote
Old 21-08-2015, 11:36   #14
Junior Cruiser
 
YachtOgler's Avatar

Cruisers Forum Supporter

Join Date: Jul 2014
Location: NYC
Boat: Still Ogling
Posts: 20
Re: Lewmar Hatch Crazed Finish Repair

Please excuse me if this is an ignorant thought process, but aren't the lenses for hatch covers designed specifically with certain safety tolerances in mind?

In the unfortunate event that the boat capsizes, those lenses are what is keeping water out of the boat before it rights itself again. Even if the boat does not capsize, there are times when massive amounts of water are on the foredeck during heavy weather, yes?

So I am curious - am I overthinking this, or should people be very careful with what exact material and its associated tolerances they choose to replace factory lenses with? For instance, I am thinking it would not be a great idea to go to a random plastics shop and have new lenses made without the specifications required for replacement from the factory (material, thickness, and any other additional safety requirements).

I am also curious as to how many times you could de-haze your hatch lenses by wet sanding them down without affecting their strength.

How far off base am I here?

EDIT: Just read Delancey's writeup. Excellent and thank you.
__________________
YachtOgler is offline   Reply With Quote
Old 21-08-2015, 11:41   #15
Senior Cruiser

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Nevada City. CA
Boat: Sceptre 41 Ohana
Posts: 3,705
Images: 9
Re: Lewmar Hatch Crazed Finish Repair

YO:

I think you are over thinking this. The tolerances are not that close. There are differences of opinions on what type of plastic you should use to replace the plastic but there are multiple products that fall within the safe category and they have their pluses and minuses. Also it is prudent on long bluewater cruises to have pieces of plywood stored on the boat which can be put over the hatches should the need arise.
__________________

__________________
Fair Winds,

Charlie

Between us there was, as I have already said somewhere, the bond of the sea. Besides holding our hearts together through long periods of separation, it had the effect of making us tolerant of each other's yarns -- and even convictions. Heart of Darkness
Joseph Conrad
Charlie is offline   Reply With Quote
Reply

Tags
hatch, lewmar

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Lewmar Ocean Hatch Lever Repair BoxerOne Monohull Sailboats 0 13-05-2013 16:02
Awlgrip Over Cracked and Crazed Gelcoat eroot Construction, Maintenance & Refit 17 18-01-2012 13:35
Crazed-Cat Boat Antics IdoraKeeper The Sailor's Confessional 16 29-08-2010 02:08
Crazed Windows / Ports Dave the Canuck Construction, Maintenance & Refit 15 14-07-2009 17:07
Privilege owners - crazed glass privileged Multihull Sailboats 4 04-09-2008 05:16


Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 23:21.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.