Brendons Zip Build

Outboard designs up to 14'

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vupilot
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Re: Brendons Zip Build

Postby vupilot » Sun Feb 14, 2016 8:19 am

Looks great! Its funny looking back on it, how we spend so much time making the bottom perfect then after the flip, nobody but you ever see's it again.
If I remember correctly I sanded to 220 for primer and 320 between paint coats.

cusoak
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Re: Brendons Zip Build

Postby cusoak » Sun Feb 14, 2016 9:12 am

Chris you are right about the bottoms and about how we want them to perfectly smooth and then you do not see them again.
What I found was that I was amazed as to how big the inside of the boat was when upright.
Jeff

bjfrater
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Re: Brendons Zip Build

Postby bjfrater » Mon Feb 15, 2016 12:14 am

Thanks, ill just sand to 80 grit then. Im going to spray using automotive paints and i think the primer coats will be fine over 80.

I agree about all the fuss over the bottom, it does seem to be a large amount of effort when it wont even be seen again. :roll:
Last edited by bjfrater on Mon Feb 15, 2016 1:56 pm, edited 2 times in total.

cusoak
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Re: Brendons Zip Build

Postby cusoak » Mon Feb 15, 2016 4:39 am

But it is the most important part of the boat construction.
Jeff

bjfrater
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Re: Brendons Zip Build

Postby bjfrater » Wed Mar 30, 2016 7:55 pm

Some progress updates, Its quite fun to be doing something different again!

After some time procrastinating and quite a bit of sanding, I have turned my workshop into a spray booth and sprayed three coats of 2pak high build primer over the hull.

Here is a shot of my workshop with the plastic bubble up.
20160316_193538.jpg


Here is the hull after three coats of primer.
20160326_153805.jpg

20160326_153829.jpg

bjfrater
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Re: Brendons Zip Build

Postby bjfrater » Wed Mar 30, 2016 8:03 pm

The Primer is a rather boring grey color and I have now sprayed a guide coat over it which will allow me to identify any low or high spots or blemishes when I go over it with the longboard.
I will then fill any low spots prior to putting the color coats on. The guide coat came out all splotchy and actually looks like I was going for some kind of camo paint job. In actual fact it was a really powdery paint and no matter how much I moved the can around or changed distance it seemed to settle on the boat in clusters. Not that it matters it was enough to get a light cover over the entire surface and will be sanded off shortly. I am already pretty happy with the surface so Im only expecting a few minor low spots that I may need one more layer of primer to fix up.

I still have to go buy the color so I can get this bottom finished and flipped. Im deciding between brown and red at this point.

Here she is with the camo paint job.
20160327_162357.jpg


20160327_162337.jpg

cusoak
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Re: Brendons Zip Build

Postby cusoak » Thu Mar 31, 2016 3:50 am

Looks good. What did you use to spray on the primer.
HVLP or regular air compressor type.
Jeff

bjfrater
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Location: Auckland, New Zealand

Re: Brendons Zip Build

Postby bjfrater » Thu Mar 31, 2016 1:41 pm

I used a gravity fed spray gun with a regular compressor. I will take some pictures of my setup tonight.

Here are a couple of shots of the final fairing that show how usefull the guide coat is for highlighting low spots.

Here is the rear part prior to fairing.
20160331_184144.jpg



Here it is half faired off. Im using my longboard like a sanding block and sanding in an X pattern to ensure I get a smooth finish. Sanding like this removes allot of material.
20160331_190146.jpg


Here it is with the fairing completed. You can see high spots where the epoxy and wood are showing through and you can see the low spots where the guide coat is still there. I was not able to see this by eye beforehand and it would probably have shown up once the glossy paint is on it. I think it just needs one spray of primer over those low bits, a quick sand and it will be ready.
20160331_194915.jpg

gdcarpenter
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Re: Brendons Zip Build

Postby gdcarpenter » Thu Mar 31, 2016 5:51 pm

Looking Good!
This is my first, last and only boat build.

http://www.gdzipbuild.blogspot.com

bjfrater
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Location: Auckland, New Zealand

Re: Brendons Zip Build

Postby bjfrater » Sun Jul 03, 2016 3:41 pm

Lots of progress since my last post.

I have now completed what feels like a marathon effort painting the zip. I have learned loads about spray painting mostly through experiencing many of the pitfalls first hand. :)

Here's what I have achieved over the last couple of months.

  • Completed the prep work with the primer
  • Sanded out all the scratches down to 1500 grit.
  • Sprayed base coat
  • Sprayed clear coat
    I really didn't like the finish on the clear coat, it wasn't flattening out and I ended up with a satin finish.
    I did some research and found some tips on heating up the clear coat before spraying it. I think it was cold in my shed and the paint was not atomizing properly out of the gun.
  • Sanded back the clear coat and burnt through in a few spots so decided to sand back to the color and respray.
  • Resprayed the color and the clear coat, better results this time but had alot of orange peel in the clear. I also had a couple of issues with the cheap gun I was using. An internal seal blew out and paint dripped out. (You get what you pay for)
  • To fix the orange peel I decided to carefully block sand back the clear and do a final flow coat.
  • I bit the bullet and bought a new Devilbiss startingline spray gun kit.
    Results of the final spray were far better than previous attempts, the Devilbiss gun allows much more material to be sprayed with a much bigger fan pattern and way less orange peel. (I wish I had the new gun from the start.)
  • I got a few runs in the clear coat, maneuvering around the shed is difficult when doing a continuous spray especially when trying to avoid touching the boat, managing the air hose and also moving lights around.
    There are some great videos on youtube for removing clear coat runs.
  • I removed the extra material in the clear coat runs using a razor blade then sanded smooth using 1500 and 2000 grit. I also went over the whole boat with 2000 and removed the remaining orange peel and dust particles.
    At one point I ran out of 1500 and had to use some 1200 that was a mistake and ment that when it came to polishing it took twice as long on those spots. If I were to do it again I would recommend going over the boat with 3000 just to reduce the amount of polishing required. Probably use a DA sander rather than doing by hand as well.
  • Finally I borrowed a Rupes Bigfoot polisher (These are awesome!) from my local car dealership and polished up the whole boat with course and fine polishing compound. I probably put in about 5 hours polishing. I cant imagine how long it would have taken if I had tried to do it by hand.

Masking up
20160509_153454.jpg


More Masking
20160509_154425.jpg


Color coat on
20160509_165629.jpg

bjfrater
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Re: Brendons Zip Build

Postby bjfrater » Sun Jul 03, 2016 4:06 pm

Here is the boat after the first attempt color and clear coat. Its hard to see in the picture but the finish was not glossy it was satin, It looked much worse in person.
20160512_184042.jpg


A close up of the satin finish
20160518_190344.jpg


My new Devilbiss starting line gun. I would recommend this if you are going to do some spray painting and want a good result.
20160625_180050.jpg

bjfrater
Posts: 124
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Location: Auckland, New Zealand

Re: Brendons Zip Build

Postby bjfrater » Sun Jul 03, 2016 4:08 pm

Here is a run that I cut back using a razor blade. Got to be very carefull not to let the corners of the blade scratch any of the paint outside the high spot.
20160702_102518.jpg


After some sanding with wet 2000 grit
20160702_103621.jpg


Polishing up
20160703_095715.jpg

bjfrater
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Location: Auckland, New Zealand

Re: Brendons Zip Build

Postby bjfrater » Sun Jul 03, 2016 4:15 pm

Thats all my updates,
I have planned the flip for weekend after next! Im going to build a cradle next weekend and take the rest of it off.

Boat half polished, (right side)
20160703_102855.jpg


Mirror finish, Really happy with the results.
20160703_151142.jpg

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Roberta
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Re: Brendons Zip Build

Postby Roberta » Sun Jul 03, 2016 5:16 pm

Looks Great!!!

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



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