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Thread: bondo and bubbles/pinholes

  1. #1
    Constant Bitrate
    Join Date
    May 2004
    Location
    Northridge CA
    Posts
    141

    bondo and bubbles/pinholes

    ok does anyone have any tips on filling in holes in hardened bondo.
    im so close to getting my civic dash done but everytime i sand it down i always uncover bubbles and find myself mixing more bondo to fill it in.

  2. #2
    Constant Bitrate
    Join Date
    Dec 2003
    Location
    Minnesota
    Posts
    122
    You need to use an different finisher spot putty to fill in the small holes. I have a tutorial on my site:

    http://www.ajquick.com/cars/guides/smooth.php
    http://www.AJQuick.com/ - Fiberglassing Tutorials!
    My Cardomain Page - 1998 Dodge Neon R/T

  3. #3
    Constant Bitrate
    Join Date
    May 2004
    Location
    Northridge CA
    Posts
    141
    cool thanks!

  4. #4
    Low Bitrate
    Join Date
    Jun 2004
    Posts
    108
    It is necessary to mix the bondo correctly in order to eliminate bubbles (which are the cause of pinholes). To do this you want to put the bondo and hardening agent next to eachother on a flat surface (I use a piece of cardboard). Then to mix the two you want to do a pulling back motion with your puddy knife. Pull the two substances down together and make sure you are pushing down with the knife. This will push all the air out of the mixture. Doing this in your preliminary bondoing will eliminate further work needed to fill in pin holes.

  5. #5
    Maximum Bitrate
    Join Date
    Jun 2004
    Location
    Bay Area, California
    Posts
    654
    also some of the higher end lightweight fillers are better at eliminating pinholes, such as rage gold as opposed to bondo brand, etc.

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