Dustless Blasting - bottom treatment afterwards

  • May 01, 2020 3:27 PM
    Message # 8940408
    Deleted user

    Hey Bud,

    I am paying the big buck to get my bottom down to the gel coat - after 45+ years of the paint not sticking (only 10 of those years are mine), I want to start fresh, and did the math on paying for dustless blasting vs scraping, sanding, tools, sandpaper, tylenols and yard days. It was close, so I went with dustless blasting. I'll be hauling late May. It will take the crew a few hours to prep, one day to blast and half a day to clean up.

    The question is - if I have no blisters, should I just apply bottom paint to the clean hull, or should I worry about a barrier coat?

    In case anyone is curious, I am switching out all of my bronze plumbing with trudesign fiber-reinforced nylon plumbing (thruhulls, seacocks, hose fittings) at the same time.

    Thanks for any feedback,


  • May 03, 2020 12:50 PM
    Reply # 8943864 on 8940408


    Good idea to remove all the old paint.  If you have a few blisters, pop them open if they smell like vinegar.  You could put some epoxy putty into them, but since the hull is so thick below the waterline, the putty is only a fairing to get a perfectly smooth bottom.  If you replace the thruhulls, countersink the heads to make an even smoother waterflow on the hull.  Don't worry about the countersink, since the hull is so thick.  I no longer have your current address, so please send it to me at bud@westsail.com.  I try to keep my owners records up to date.

  • June 14, 2020 8:13 PM
    Reply # 9037403 on 8940408
    Anonymous member (Administrator)


    Very interested how the dustless blasting worked for removing the old bottom finish - especially how the waste was handled and the cost. 

    When I talked to a couple of yards here in CA  about dustless blasting -- they didn't want to even talk about the process. 


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