OK, so I'm Sanding My Bottom... - SailNet Community
 12Likes
Reply
 
LinkBack Thread Tools
post #1 of 98 Old 04-17-2012 Thread Starter
Superior Sailor
 
Squidd's Avatar
 
Join Date: Sep 2011
Location: Eagle River Wi.
Posts: 978
Thanks: 6
Thanked 9 Times in 8 Posts
Rep Power: 4
 
OK, so I'm Sanding My Bottom...

But I'm from the Midwest and not so sure what I'm looking at...(all we paint out here is houses barns and tractors...)

Is this supposed to be so "lumpy"...



Doesn't look like any "paint" I've ever seen before... It looks "thick"... like an 1/8" thick and like it was put on with a spatula and back brushed with a whisk broom...that's just the "Red" layer...



And it's "Soft" almost chalky or powdery...some of it flakes off (in the blistery ares and the "layered" areas.. and then the rest is stuck on tight...

Below that is a light blue/gray also "Thick" powdery layer...





I think it had popped blisters as well and then the red went over that...

Below the Gray is a greenish chopped fiberglass layer that is hard...

The whole thing down to Glass is almost 1 1/4" thick...



But you can see some of the red also goes all the way down to the glass matt..

So what do I got here and what do I do with it...??

I'm thinking continue sanding all the blisters/bubbles down to the green glass matt and then fair and fill with some sort of epoxy/poly "filler"...?

Then fair the bulk of the bottom to smooth out the "lumps...

Prime (type) ??

Bottom paint...

What I'm looking for is advice on getting it to the "primed" stage...There's enough arguments/threads on bottom paint choices already...

Thanks in advance...

"Might as well take 'er out...If anything is gonna happen...It's gonna happen out there..."
"Captin Ron"

Last edited by Squidd; 04-17-2012 at 08:35 PM.
Squidd is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 98 Old 04-17-2012
Senior Member
 
Join Date: Jul 2002
Location: Rhode island
Posts: 168
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 14
 
Re: OK, so I'm Sanding My Bottom...

Wow Squidd, it look s like you've opened a real can of worms. My guess it this boat as been filled and faired,, and fillled and faired,,, and filled and faired again, and not once was it done right.

I couldn't begin to tell you all the steps but you have to get down to a firm foundation. I hope you got a good deal on the boat.
mitiempo likes this.
jfdubu is offline  
Quote Quick Reply Share with Facebook
post #3 of 98 Old 04-17-2012 Thread Starter
Superior Sailor
 
Squidd's Avatar
 
Join Date: Sep 2011
Location: Eagle River Wi.
Posts: 978
Thanks: 6
Thanked 9 Times in 8 Posts
Rep Power: 4
 
Re: OK, so I'm Sanding My Bottom...

The "gel coat" if there is one is whats throwing me...

I would assume the ablative coat(s) would be soft and when sanding I should "hit" a hard coat layer (gel coat) but it just kind of mixes and blends with the gray coat and then bango...glass matt...??

Here's a couple more shots...where you can see glass and depthe of "gray matter"





Blisters aren't "watery" blisters more like air bubbles between layers...and then when they open, they kinda peel away at the edges to become open "sores"..

Some in the red just down to gray... and some in gray that were covered by red...

And a couple that went thru both layers down to glass matt

"Might as well take 'er out...If anything is gonna happen...It's gonna happen out there..."
"Captin Ron"
Squidd is offline  
Quote Quick Reply Share with Facebook
post #4 of 98 Old 04-17-2012
Just another Moderator
 
Faster's Avatar
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 16,534
Thanks: 104
Thanked 314 Times in 301 Posts
Rep Power: 10
     
Re: OK, so I'm Sanding My Bottom...

Pretty cool pictures of the surface of the moon!!

What are you using for this job? Looks like a very aggressive abrader, I'm a little worried you're going too deep. Some of these spots look well into the laminate.

Huge fairing job ahead!

Ron

1984 Fast/Nicholson 345 "FastForward"

".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
Faster is offline  
Quote Quick Reply Share with Facebook
post #5 of 98 Old 04-17-2012 Thread Starter
Superior Sailor
 
Squidd's Avatar
 
Join Date: Sep 2011
Location: Eagle River Wi.
Posts: 978
Thanks: 6
Thanked 9 Times in 8 Posts
Rep Power: 4
 
Re: OK, so I'm Sanding My Bottom...

Quote:
Originally Posted by jfdubu View Post
Wow Squidd, it look s like you've opened a real can of worms. My guess it this boat as been filled and faired,, and fillled and faired,,, and filled and faired again, and not once was it done right.

I couldn't begin to tell you all the steps but you have to get down to a firm foundation. I hope you got a good deal on the boat.
Deal wise I'm doing OK... bought it at auction for under a grand, hauled it home for under a grand...and have it rigged and readied to sail for just a little over a grand (lottsa work on my part)....So depending on what the bottom takes I'll be on the water well under 4...

I'm not looking for a 30 year repair or "investment"...

I want to do it "well" and reasonably economical for now...I don't think I'll be going down to glass and re gelcoating the bottom, I just want to get it faired, waterproofed, hard coated and back in the water...

"Might as well take 'er out...If anything is gonna happen...It's gonna happen out there..."
"Captin Ron"
Squidd is offline  
Quote Quick Reply Share with Facebook
post #6 of 98 Old 04-17-2012 Thread Starter
Superior Sailor
 
Squidd's Avatar
 
Join Date: Sep 2011
Location: Eagle River Wi.
Posts: 978
Thanks: 6
Thanked 9 Times in 8 Posts
Rep Power: 4
 
Re: OK, so I'm Sanding My Bottom...

Quote:
Originally Posted by Faster View Post
Pretty cool pictures of the surface of the moon!!

What are you using for this job? Looks like a very aggressive abrader, I'm a little worried you're going too deep. Some of these spots look well into the laminate.

Huge fairing job ahead!
60/80 grit in 5" random orbital...

There are some deep grooves in the glass but you can also see the red in grooves that were there before I got to it..

"Might as well take 'er out...If anything is gonna happen...It's gonna happen out there..."
"Captin Ron"
Squidd is offline  
Quote Quick Reply Share with Facebook
post #7 of 98 Old 04-17-2012
Senior Member
 
bljones's Avatar
 
Join Date: Oct 2008
Location: South Coast Ontario
Posts: 8,480
Thanks: 35
Thanked 91 Times in 81 Posts
Rep Power: 8
   
Re: OK, so I'm Sanding My Bottom...

Squidd,

Ditto what jfdub said.

If you want to be in the water this season, forget you saw what you saw, mix up some slightly thickened epoxy, slather it on the exposed mat, roll it out, mix up some fairing compound, slather it on, sand and shape it, cover it with some barrier coat, bottom paint and go. In the fall, soda blast it and spend the winter cleaning it up.

It's 5 o'clock somewhere:


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
bljones is offline  
Quote Quick Reply Share with Facebook
post #8 of 98 Old 04-17-2012
Senior Member
 
mitiempo's Avatar
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,509
Thanks: 0
Thanked 96 Times in 87 Posts
Rep Power: 8
   
Re: OK, so I'm Sanding My Bottom...

Squidd

You don't have to re-gelcoat it. But you have to get rid of the bottom paint from the previous 3 decades or so to get any fairing material to stick to it. Apparently no previous owner bothered.

I don't think it would be very expensive - a lot of work though.

After the bottom paint is gone, fill any dips with thickened epoxy, fair with epoxy mixed with low density filler, a coat or 2 of straight epoxy and then bottom paint.

Brian
Living aboard in Victoria Harbour
mitiempo is offline  
Quote Quick Reply Share with Facebook
post #9 of 98 Old 04-17-2012
Senior Member
 
mitiempo's Avatar
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,509
Thanks: 0
Thanked 96 Times in 87 Posts
Rep Power: 8
   
Re: OK, so I'm Sanding My Bottom...

Quote:
Originally Posted by bljones View Post
Squidd,

Ditto what jfdub said.

If you want to be in the water this season, forget you saw what you saw, mix up some slightly thickened epoxy, slather it on the exposed mat, roll it out, mix up some fairing compound, slather it on, sand and shape it, cover it with some barrier coat, bottom paint and go. In the fall, soda blast it and spend the winter cleaning it up.
That's the quick fix.

Brian
Living aboard in Victoria Harbour
mitiempo is offline  
Quote Quick Reply Share with Facebook
post #10 of 98 Old 04-17-2012
Closet Powerboater
 
MedSailor's Avatar
 
Join Date: Mar 2008
Location: Anacortes PNW
Posts: 3,575
Thanks: 258
Thanked 111 Times in 100 Posts
Rep Power: 8
 
Re: OK, so I'm Sanding My Bottom...

Since you're sanding that super toxic stuff, I assume that you have all 147 permits that are required and that you've conducted fish impact studies as well using EPA certified salmon psychiatrists....

:-)

MedSailor

PS That grey matter looks like the real fiberglass of your hull. Me thinks you went a little too deep there. Perhaps a lighter grit sandpaper would be better?

I have a sauna on my boat, therefore I win.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
MedSailor is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
bottom paint removal: sanding vs. stripping Krist Gear & Maintenance 5 10-17-2011 08:22 PM
Light sanding vs sanding vs heavy sanding jarcher Gear & Maintenance 1 05-17-2009 12:45 PM
Do it yourself sanding TheKnapps General Discussion (sailing related) 4 07-12-2008 10:19 PM
wet sanding johnnennis Gear & Maintenance 12 11-05-2006 07:05 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome