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    • UnderDawg

      A Few Simple Rules   05/22/2017

      Sailing Anarchy is a very lightly moderated site. This is by design, to afford a more free atmosphere for discussion. There are plenty of sailing forums you can go to where swearing isn't allowed, confrontation is squelched and, and you can have a moderator finger-wag at you for your attitude. SA tries to avoid that and allow for more adult behavior without moderators editing your posts and whacking knuckles with rulers. We don't have a long list of published "thou shalt nots" either, and this is by design. Too many absolute rules paints us into too many corners. So check the Terms of Service - there IS language there about certain types of behavior that is not permitted. We interpret that lightly and permit a lot of latitude, but we DO reserve the right to take action when something is too extreme to tolerate (too racist, graphic, violent, misogynistic, etc.). Yes, that is subjective, but it allows us discretion. Avoiding a laundry list of rules allows for freedom; don't abuse it. However there ARE a few basic rules that will earn you a suspension, and apparently a brief refresher is in order. 1) Allegations of pedophilia - there is no tolerance for this. So if you make allegations, jokes, innuendo or suggestions about child molestation, child pornography, abuse or inappropriate behavior with minors etc. about someone on this board you will get a time out. This is pretty much automatic; this behavior can have real world effect and is not acceptable. Obviously the subject is not banned when discussion of it is apropos, e.g. talking about an item in the news for instance. But allegations or references directed at or about another poster is verboten. 2) Outing people - providing real world identifiable information about users on the forums who prefer to remain anonymous. Yes, some of us post with our real names - not a problem to use them. However many do NOT, and if you find out someone's name keep it to yourself, first or last. This also goes for other identifying information too - employer information etc. You don't need too many pieces of data to figure out who someone really is these days. Depending on severity you might get anything from a scolding to a suspension - so don't do it. I know it can be confusing sometimes for newcomers, as SA has been around almost twenty years and there are some people that throw their real names around and their current Display Name may not match the name they have out in the public. But if in doubt, you don't want to accidentally out some one so use caution, even if it's a personal friend of yours in real life. 3) Posting While Suspended - If you've earned a timeout (these are fairly rare and hard to get), please observe the suspension. If you create a new account (a "Sock Puppet") and return to the forums to post with it before your suspension is up you WILL get more time added to your original suspension and lose your Socks. This behavior may result a permanent ban, since it shows you have zero respect for the few rules we have and the moderating team that is tasked with supporting them. Check the Terms of Service you agreed to; they apply to the individual agreeing, not the account you created, so don't try to Sea Lawyer us if you get caught. Just don't do it. Those are the three that will almost certainly get you into some trouble. IF YOU SEE SOMEONE DO ONE OF THESE THINGS, please do the following: Refrain from quoting the offending text, it makes the thread cleanup a pain in the rear Press the Report button; it is by far the best way to notify Admins as we will get e-mails. Calling out for Admins in the middle of threads, sending us PM's, etc. - there is no guarantee we will get those in a timely fashion. There are multiple Moderators in multiple time zones around the world, and anyone one of us can handle the Report and all of us will be notified about it. But if you PM one Mod directly and he's off line, the problem will get dealt with much more slowly. Other behaviors that you might want to think twice before doing include: Intentionally disrupting threads and discussions repeatedly. Off topic/content free trolling in threads to disrupt dialog Stalking users around the forums with the intent to disrupt content and discussion Repeated posting of overly graphic or scatological porn content. There are plenty web sites for you to get your freak on, don't do it here. And a brief note to Newbies... No, we will not ban people or censor them for dropping F-bombs on you, using foul language, etc. so please don't report it when one of our members gives you a greeting you may find shocking. We do our best not to censor content here and playing swearword police is not in our job descriptions. Sailing Anarchy is more like a bar than a classroom, so handle it like you would meeting someone a little coarse - don't look for the teacher. Thanks.
    • B.J. Porter

      Moderation Team Change   06/16/2017

      After fifteen years of volunteer moderation at SA, I will no longer be part of the moderation team. The decision to step aside is mine, and has been some time in the works but we did not wish to announce it in advance for a number of reasons. It's been fun, but I need my time back for other purposes now. The Underdawg admin account will not be monitored until further notice, as I will be relinquishing control of it along with my administrative privileges. Zapata will continue on as a moderator, and any concerns or issues can be directed to that account or to the Editor until further notice. Anyone interested in helping moderate the forums should reach out to Scot by sending a PM to the Editor account. Please note that I am not leaving the community, I am merely stepping aside from Admin responsibilities and privileges on the site.

18 posts in this topic

I was told to use Polyurethane adhesive/sealant(colored) to fix hairline crack / crazing on fiberglass surface. I believe it works but is it quite right way?

How do you fix crazing?

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And gel coat crazing, use gel coat filler?

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I had a cape dory 22 ....cape dory line was known for gelcoat crazing...it's difficult to get rid of....on my nonskid I would put on a fresh coat of interdeck and that would keep it covered up for a couple of yrs then redo....I believe it's more cosmetic than anything...it does keep coming back ....

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1) sand the gelcoat off and repaint with PU.

2) stiffen the structure with extra laminate and re-gelcoat

 

Those are really the only ways to fix it permanently. The substrate is more flexible than the coating, so the coating is cracking. You need to make the coating more flexible or the substrate stiffer.

 

I'm assuming this is happening in corners etc. If happening all over then it is probably just the gel coat getting old and shrinking off.

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1) sand the gelcoat off and repaint with PU.

2) stiffen the structure with extra laminate and re-gelcoat

 

Those are really the only ways to fix it permanently. The substrate is more flexible than the coating, so the coating is cracking. You need to make the coating more flexible or the substrate stiffer.

 

I'm assuming this is happening in corners etc. If happening all over then it is probably just the gel coat getting old and shrinking off.

Thank you,

How about the hairline over fiberglass? Is it good using same way, sanding surface and repainted over?

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1) sand the gelcoat off and repaint with PU.

2) stiffen the structure with extra laminate and re-gelcoat

 

Those are really the only ways to fix it permanently. The substrate is more flexible than the coating, so the coating is cracking. You need to make the coating more flexible or the substrate stiffer.

 

I'm assuming this is happening in corners etc. If happening all over then it is probably just the gel coat old and shrinking off.

+1. The problem with GRP hulls is the gelcoat is more brittle than the laminate beneath it? So when the hull flex's tue laminate can mobe cause its got a fibre structure to support it but the gelcoat is just coloured poyester resin with no structure and as such just cracks.

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1) sand the gelcoat off and repaint with PU.

2) stiffen the structure with extra laminate and re-gelcoat

 

Those are really the only ways to fix it permanently. The substrate is more flexible than the coating, so the coating is cracking. You need to make the coating more flexible or the substrate stiffer.

 

I'm assuming this is happening in corners etc. If happening all over then it is probably just the gel coat getting old and shrinking off.

Thank you,

How about the hairline over fiberglass? Is it good using same way, sanding surface and repainted over?

 

 

sanding surface yes, but all the way to glass.just roughing up the gel coat will transmit the cracks.

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If gelcoat is spider crazing in areas that don't appear to flex much, it is probably just failing due to age. Gelcoat is brittle, and gets more brittle with age. I'm not sure if this is UV exposure or drying out, but I have seen many cases of a broad expanse of gelcoat, all spider crazed, with a small section in the middle covered in say vinyl lettering or a painted on name. Under the vinyl/paint it looks like new. If it is spider crazing, you can have success sanding it down until the crazing is removed, which may not be all the way to the laminate. Then repaint with PU, which sticks much better, is much more flexible, and stops the deterioration of the gel coat. If you go all the way to the laminate then there is significant expense/labor in repriming and refairing.

 

It would be helpful to see a picture.

 

If it is just a few cracks, the usual remedy is to reef them out wider (Dremel etc.), fill with gel coat patching stuff, sand smooth. You have to reef them wider or the patch will not stay stuck. It is usually very difficult to make this look good, because you are trying to match an old faded color with new unfaded color, which is going to fade at a different rate. But it might look better than the cracks for awhile.

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Pictures here.

post-129660-0-75743300-1490072196_thumb.jpg

post-129660-0-28277100-1490072279_thumb.jpg

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The first pic looks like damage caused from flexing.

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The first pic looks like damage caused from flexing.

Yes, i am thinking same,,

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I think the first pic looks like scratches, not cracking. Someone ran into your boat. Scratches will have a V shaped cross section while cracks should be tight (until pieces fall out). Look very closely at it, with an eye loupe if possible. If someone hit it, there may also be stress cracking in the area.

 

The second one looks like the gel coat is shrinking off the surface. Maybe it was applied extra thick there. In that area, you could sand down and paint or re-gel coat.

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Lightly tap the crazing area in the second picture. My money is that there's a void between the gel coat and glass in the area. A rather sharp corner like that it's pretty common that the guys laying up the hull didn't manage to get the glass into the bend.

 

That or DDW's theory of too thick gel coat application that has shrank.

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The first picture, where is that on the hull, at the bottom of the transom? If it is I'd think the cracks are right along the inside taped edge of the hull and deck are bonded together. Some additional reinforcement should be layed up inside as part of the repair.

 

The second picture, could very well be from thick gel coat.

Remember you're looking at it from upside down as to how the part was made. That that toe rail was a trough on the mold, very easy to overspray that area when applying the gel coat.

Overall an easy gelcoat repair.

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The first picture, those cracks came up sudden, like an over night. I did not have any idea what's happened.

I understood now for the second picture.

Thank you, all!

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Is that first pic your stern overhang?

 

Is it possible someone - or something, like a floating dock - got under there and the boat slammed down on it?

 

Have a look at the hull underneath and see if there's any evidence of something hitting it.

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Is that first pic your stern overhang?

 

Is it possible someone - or something, like a floating dock - got under there and the boat slammed down on it?

 

Have a look at the hull underneath and see if there's any evidence of something hitting it.

Thanks, I started thinking that way, will check out.

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I had a cape dory 22 ....cape dory line was known for gelcoat crazing...it's difficult to get rid of....on my nonskid I would put on a fresh coat of interdeck and that would keep it covered up for a couple of yrs then redo....I believe it's more cosmetic than anything...it does keep coming back ....

+1. Still, there are ways to fill, wipe and let cure using epoxy. Depends. comment 12 and 13 seem logical also. I did not own the boat, but acquaintance did and I crew when racing. He was constantly fiddling with finish, especially inside the cuddy, which I would have done up every couple years, as it appeared.

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