modified malahini

Designs for inboard or outboard power

Moderator: BruceDow

User avatar
DrBryanJ
Posts: 769
Joined: Fri Jul 22, 2011 6:05 am
Location: New Jersey

Re: modified malahini

Postby DrBryanJ » Tue Oct 31, 2017 6:27 am

Next problem: Started to fiberglass bottom. Used System three epoxy on starboard side. No problems, but I ran out. Used Silvertip on port side. Applied 12 hours ago. It does not seem to be setting. Mixed at a 100:44 weight ratio as stated on bottles. Mixed for 2 minutes. What should I do? I'm inclined to removed port side fiberglass, clean up mess and start over with System three. Also, I don't want to start filling the starboard side with SilverTip as it may not set and cause I bigger mess. Can I let starboard side fully cure and fill cloth later?
Bryan

Building a malahini "Mona Lisa"

My wife said "If I build a boat, she's getting a divorce."

User avatar
mrintense
Posts: 2907
Joined: Thu Jun 10, 2010 11:22 am
Location: Austin, Texas
Contact:

Re: modified malahini

Postby mrintense » Tue Oct 31, 2017 8:43 am

Bryan,

Two things I would do here.

First, wait at least a day (assuming it gets up over 50 degrees today) to see if the epoxy is just slow curing because of the cold.
Secondly, in a controlled environment (i.e. not cold) test out the Silvertip on a scrap piece of wood and glass to see if you have a bad batch.
Carl
a.k.a. Clipper

Crafting a classically styled Vera Cruise named "Some Other Time"

Clipper's Vera Cruise Build

User avatar
Bill Edmundson
Posts: 11109
Joined: Wed Nov 23, 2005 6:45 am
Location: Birmingham, AL, USA
Contact:

Re: modified malahini

Postby Bill Edmundson » Tue Oct 31, 2017 9:06 am

In cold weather I often put a small space heater under the hull.

Bill
Mini -Tug, KH Tahoe 19 & Bartender 24 - There can be no miracle recoveries without first screwing up.
Tahoe 19 Build

User avatar
Jimbob
Posts: 563
Joined: Thu Jul 25, 2013 1:07 pm
Location: Sacramento, CA

Re: modified malahini

Postby Jimbob » Tue Oct 31, 2017 10:06 am

Hi Bryan,
I would wait also. I also use the silver tip epoxy myself. Even in warm weather it usually takes overnight to cure using the slow hardner. I have worried in the past, but it always cures. Cold weather really slows things down. I have been putting the epoxy containers in warm water in my utility sink before I mix them up. As bill said, try a space heater. In cold weather I use the fast hardner, and in hot weather I use the slow hardner.
Jim
Jim Neeley
Building a Barrelback in Sacramento, CA
viewtopic.php?f=15&t=28089#p172969

User avatar
Roberta
Posts: 6157
Joined: Tue Jul 31, 2007 5:23 pm
Location: East Troy, Wisconsin

Re: modified malahini

Postby Roberta » Tue Oct 31, 2017 10:52 am

12 hours is not really long enough. I haven't used Silver Tip much. I generally use the System Three General Purpose, but you do need to recoat in 24 hrs or clean and sand to remove any blush and rough up the surface for a mechanical bond.

Roberta
Roberta "Queen of the Boat Builders"
Built Zip "Oliver IV", Super Spartan "Jimmy 70", and Torpedo "The Glen L".

User avatar
DrBryanJ
Posts: 769
Joined: Fri Jul 22, 2011 6:05 am
Location: New Jersey

Re: modified malahini

Postby DrBryanJ » Tue Oct 31, 2017 2:21 pm

Well, I figured out the stupid mistake I made.
I don't want to admit what I did, but I guess I will so others don't make the same mistake. :oops: :oops: :oops: :oops: :oops: :oops: :oops:
When I grabbed my new bottles of epoxy I grabbed 2 bottles of part a. I read the label on one bottle, so of course, the other had to be part b. I happily applied the fiberglass cloth and couldn't figure out why it wasn't cured in the morning. It finally dawned on me the two bottles should be different sized. So, now I have removed the bad cloth and cleaned everything with acetone and warm soap and water. When my new cloth arrives I will try again. After hunting through the basement I finally found the other two bottles of part b. I am now filling the weave on the starboard side.
Bryan

Building a malahini "Mona Lisa"

My wife said "If I build a boat, she's getting a divorce."

User avatar
Roberta
Posts: 6157
Joined: Tue Jul 31, 2007 5:23 pm
Location: East Troy, Wisconsin

Re: modified malahini

Postby Roberta » Tue Oct 31, 2017 3:59 pm

Oooops!

Roberta
Roberta "Queen of the Boat Builders"
Built Zip "Oliver IV", Super Spartan "Jimmy 70", and Torpedo "The Glen L".

PeterG
Posts: 558
Joined: Mon Dec 03, 2007 7:08 am
Location: Connecticut

Re: modified malahini

Postby PeterG » Wed Nov 01, 2017 8:35 am

There you go! Nice recovery... A lesson for all of us to learn from :D
Murphy's Law: Anything that can go wrong, will go wrong.
Griffin's Law: Murphy was an optimist.

JimmY
Posts: 664
Joined: Sat Jul 30, 2016 11:08 am
Location: Brighton, MI

Re: modified malahini

Postby JimmY » Wed Nov 01, 2017 9:31 am

I think you should have given it another day, to see if would set up! :D

The nice thing about silver tip, is the no blush qualities. You have 3 days to recoat without sanding, but if you are applying multiple coats you have to make sure you have a plan to get the subsequent coats applies within that 3 day window.
-Jim
Nothing says poor craftsmanship like wrinkles in your duct tape!

User avatar
DrBryanJ
Posts: 769
Joined: Fri Jul 22, 2011 6:05 am
Location: New Jersey

Re: modified malahini

Postby DrBryanJ » Wed Nov 01, 2017 9:54 am

JimmY it never would have set. I mixed part A with Part A, not part B. Stupid trick, but one I will never do again.
Bryan

Building a malahini "Mona Lisa"

My wife said "If I build a boat, she's getting a divorce."

User avatar
DrBryanJ
Posts: 769
Joined: Fri Jul 22, 2011 6:05 am
Location: New Jersey

Re: modified malahini

Postby DrBryanJ » Thu Nov 02, 2017 6:01 am

So, I have the fiberglass cloth on. I have put on an additional 2 coats of epoxy (three total). I can still see the texture of the cloth. Do I need to continue filling the weave, or should there be enough epoxy to sand and make everything smooth?
Bryan

Building a malahini "Mona Lisa"

My wife said "If I build a boat, she's getting a divorce."

Hercdrvr
Posts: 646
Joined: Mon May 11, 2015 12:52 pm
Location: McKinney TX

Re: modified malahini

Postby Hercdrvr » Thu Nov 02, 2017 6:30 am

That’s probably enough. You might have to fill in some low spots with more epoxy. As you sand you’ll get a feel for when you’re about to sand into the cloth. My next step was building the transom edge back up and sanding it to a sharp corner.
Getting close to a flip on this one.
Matt B

User avatar
DrBryanJ
Posts: 769
Joined: Fri Jul 22, 2011 6:05 am
Location: New Jersey

Re: modified malahini

Postby DrBryanJ » Thu Nov 02, 2017 6:58 am

Thanks Matt. Yes can finally see some hope of flipping. Only have sand, prime, paint, add lift strakes and spray rails, and build cradle before flip. At my pace it will only take me 1 year. I laugh when I think how at last two gatherings I said I'd be flipping by Thanksgiving
Bryan

Building a malahini "Mona Lisa"

My wife said "If I build a boat, she's getting a divorce."

User avatar
Bill Edmundson
Posts: 11109
Joined: Wed Nov 23, 2005 6:45 am
Location: Birmingham, AL, USA
Contact:

Re: modified malahini

Postby Bill Edmundson » Thu Nov 02, 2017 7:18 am

I usually do 3 total. If you're painting, it doesn't matter if you just start to see cloth. With bright work, put another coat on at the slightest sign.

Bill
Mini -Tug, KH Tahoe 19 & Bartender 24 - There can be no miracle recoveries without first screwing up.
Tahoe 19 Build

User avatar
DrBryanJ
Posts: 769
Joined: Fri Jul 22, 2011 6:05 am
Location: New Jersey

Re: modified malahini

Postby DrBryanJ » Thu Nov 02, 2017 7:51 am

Thanks Bill. I guess it's time to sand again.
Bryan

Building a malahini "Mona Lisa"

My wife said "If I build a boat, she's getting a divorce."


Return to “Power Boats”

Who is online

Users browsing this forum: PeterG and 14 guests