1970 Coronado 15 Hull # 553 Repair, advice welcome!

Discussion in 'Sailboats' started by coronadoVT, Feb 9, 2018.

  1. coronadoVT
    Joined: Feb 2018
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    Location: Northern California

    coronadoVT Junior Member

    Hello!
    Thank you for motivating me! I will watch that video this evening.
    The fiberglass order is arriving tomorrow, and today I removed the wooden fin from the forefoot. Here are a few pictures cleaned up. There is still a *little* dry rotted wood on the very bottom, that I carefully have been removing with a chisel. There is a little left to the front of the centerboard trunk as well, with some fiberglass on either side.
    I will have to look into the filler/silica, as I am not familiar with these materials. How are they used, typically?
    I can make a small add on order once I read a little about them. Do you have any recommendations on specifics, for these products?

    P1050368.JPG P1050369.JPG P1050370.JPG
     
  2. Canracer
    Joined: Aug 2009
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    Location: Florida

    Canracer Senior Member

    The video shows general information about how epoxy is mixed. It's really not the greatest "how to."

    Your boat is looking good. That wood on the CB trunk should be removed (try to peel off the fiberglass tabs in one piece.) A chisel can be very useful but be careful, it shouldn't take too much force. Take everything down to clean glass (this will require sanding.)
     
    Last edited: Oct 6, 2018
  3. Canracer
    Joined: Aug 2009
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    Location: Florida

    Canracer Senior Member

    Surface prep is probably the most important thing. Anyplace you plan to use epoxy should be paint free, and also cleared of old repairs. Do you have a 4" grinder?
     
  4. coronadoVT
    Joined: Feb 2018
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    Location: Northern California

    coronadoVT Junior Member

    Okay, I do have a random orbit sander, which I can use to prep the surface below the forefoot. I do not have a grinder; what would you recommend?
    The fiberglass order arrived yesterday, but I am currently in the midst of a push at work for the next couple days. I will look into getting a grinder of some sort, a respirator, and learning more about the fiberglass procedure.
     
  5. Canracer
    Joined: Aug 2009
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    Location: Florida

    Canracer Senior Member

    The random orbital sander is nice to own. During my boat repair journey, I used every opportunity to buy new tools. I wanted to own as many tools as possible and I wanted to know how to use them. The grinder I bought was a Makita (it was maybe 100 or 150 bucks.) But you can pick up one for maybe $25 at Harbor freight. It will do the same job. When it comes to buying sandpaper and grinding disks stay clear of the HF stuff (buy the best and you won't regret it; don't save money on sandpaper.)
     
    Last edited: Oct 8, 2018
  6. Canracer
    Joined: Aug 2009
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    Location: Florida

    Canracer Senior Member

    At some point you will want to turn the hull over. This requires help from a friend, or an over head lift. You will want saw horses or whatever you can find. Be careful because the hull is not as light as it might look.

    Oh yeah, about the fillers. You can pick them up at almost any marine store and they aren't very expensive. Cross that bridge a bit down the road. Right now it might be better to focus on prepping the hull. But you'll want some silica and some microballoons.
     
  7. Canracer
    Joined: Aug 2009
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    Location: Florida

    Canracer Senior Member

    The hull can be lowered off the back of the trailer and onto an air mattress. At that point one guy can roll it over. Use lots of foam if you go this route. Take it slow and remember that the boat is HEAVY.

    Two sawhorses at the transom and jack stands (with boards) at the bow.
    blanket2.jpg

    Air mattress in the middle and flotation foam at the ends.
    bottom3.jpg

    More air mattress.
    still9.jpg
     

  8. coronadoVT
    Joined: Feb 2018
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    Location: Northern California

    coronadoVT Junior Member

    Hello!
    Thank you for the pictures! It looks like a creative way to move the hull about. I received my order from US composites today, and am very happy with everything. I am very excited to get into this project, as work allows. P1050376.JPG
    So I will look at making an additonal order of silica and microballoons. My understanding is that the goal is to smooth out the hull surface, to create less drag and less resistance to water flowing over the underside of the hull? Essentially fairing the hull to make it smooth and refinish it?
     
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