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Finishing MDF

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  • #16
    Originally posted by bolland83 View Post
    Mitered corner joints and vinyl wrap, duratex on the baffle, easiest finish job ever. Something to consider for future projects.
    [ATTACH=CONFIG]n1345629[/ATTACH]
    ​That duratex coat looks sweet....!
    Brian Steele
    www.diysubwoofers.org

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    • #17
      Originally posted by Brian Steele View Post

      ​That duratex coat looks sweet....!
      Thanks! It's pretty amazing stuff, I love it. Super easy to work with, and pretty hard to screw up, even for a hack like me. Their foam rollers are also very nice, I notice they wash off exceptionally well, so they can be re-used quite a bit.
      My modest builds:
      Armadillo TM, A.K.A. Lil' Dillo
      Tarkus/Armadillo build #2
      Armadillo Center Channel
      Au-Rock-O Sub
      Tarkus
      Staining MDF tutorial

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      • #18
        Update: i have the cabs sanded to 220. I don't recommend using undiluted glue, or at least in the manner i did, because it making sanding difficult. I was able to get away with one coat but using my ROS and just hand sanding was able to heat and melt the glue in a could areas. It wasnt horrible and i was able to fix them, but i can see using two thinner coats could make this process smoother Sent from my iPhone using Tapatalk Pro

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        • #19
          I only use a single thin coat. If you try to put another on it just sits on the top. I guess a second coat could be handy if you missed spots but it isn't too hard to get complete coverage with a single coat without missing spots.

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          • #20
            Originally posted by ameuba10 View Post
            Update: i have the cabs sanded to 220. I don't recommend using undiluted glue, or at least in the manner i did, because it making sanding difficult. I was able to get away with one coat but using my ROS and just hand sanding was able to heat and melt the glue in a could areas. It wasnt horrible and i was able to fix them, but i can see using two thinner coats could make this process smoother Sent from my iPhone using Tapatalk Pro
            ​Yup, that's been my experience using undiluted glue as well. I use a 50/50 (or even thinner) mix for ply, but MDF does pose a challenge - make it too thin and the MDF just absorbs it and starts swelling.
            Brian Steele
            www.diysubwoofers.org

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            • #21
              Originally posted by philthien View Post
              I only use a single thin coat. If you try to put another on it just sits on the top. I guess a second coat could be handy if you missed spots but it isn't too hard to get complete coverage with a single coat without missing spots.
              ​I coat until it starts beading on the surface, indicating that the surface is properly sealed. Thinned wood glue cleans up easily with a damp cloth (before it dries), so I just wipe off the excess when that happens.
              Brian Steele
              www.diysubwoofers.org

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              • #22
                Originally posted by Wolf View Post
                Trigger-caps really he!p! No sore fingers! I use Elmer's white glue straight, no water. Don't sand heavy handed, or the resin will melt and flake if it went on too thick. Use a roller or brush to apply the glue thinly and evenly.
                Later,
                Wolf
                Do you think I could get away with sponging the stuff on?

                After an awfully long break, I'm trying this "speaker building" thing again, and my first project is already showing MDF seams...

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                • #23
                  You could just rub it in with your fingers. I used to do it that way before I started using a brush, and only on the edges. Now I coat the entire cabinet to seal it, but just a coat to get coverage. I don't lay it on thick.

                  Later,
                  Wolf
                  "Wolf, you shall now be known as "King of the Zip ties." -Pete00t
                  "Wolf and speakers equivalent to Picasso and 'Blue'" -dantheman
                  "He is a true ambassador for this forum and speaker DIY in general." -Ed Froste
                  "We're all in this together, so keep your stick on the ice!" - Red Green aka Steve Smith

                  *InDIYana event website*

                  Photobucket pages:
                  http://photobucket.com/Wolf-Speakers_and_more

                  My blog/writeups/thoughts here at PE:
                  http://techtalk.parts-express.com/blog.php?u=4102

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