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Thread: JB Weld and bondo?

  1. #1
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    JB Weld and bondo?

    Venturing into puttin an 8" lcd. Will jb weld work and yhe use bondo as filler? what type of sand paper do i need? Any inputs for a completely noob? Do not want to screw up..

  2. #2
    Sheepdog rdholtz's Avatar
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    More information is necessary. The more we know, the better we can help.

    Are you planning to attach the LCD bezel to the dash bezel? What are the bezel materials?

    How do you plan to support the LCD panel? In other words, is the bezel going to fit over a separately-supported LCD panel as trim, or are you thinking of building the entire panel into the bezel?

    Other information helps, too: What kind of car is this for? What kind of LCD panel are you using? Can you include a picture of the area you want to install into?

    Have you used and to find if anyone else has done this? What did you find?
    .
    If just enough is really good, then too much ought to be perfect.

    2006 Scion xB with in-dash Atom & Lilliput 889GL -- Worklog at http://www.mp3car.com/vbulletin/work...res-links.html
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  3. #3
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    Quote Originally Posted by rdholtz View Post
    More information is necessary. The more we know, the better we can help.

    Are you planning to attach the LCD bezel to the dash bezel? What are the bezel materials?

    How do you plan to support the LCD panel? In other words, is the bezel going to fit over a separately-supported LCD panel as trim, or are you thinking of building the entire panel into the bezel?

    Other information helps, too: What kind of car is this for? What kind of LCD panel are you using? Can you include a picture of the area you want to install into?

    Have you used and to find if anyone else has done this? What did you find?

    It is going on a 95 Mercury Cougar. I have an 8" LCD.. HEre are some pics:

    The LCD:






    The dash (not my car,but same layout):






    The air/heat controls will be relocated to another place not on the bezel dash and on the bottom spot I will have the stereo. I want to attach the LCD panel to the car bezel, like every one uses. Bezel is plastic like all other bezels..

    I've searched but only found pictures but nothing specific as to what materials used. I did found that bondo glass is stronger and will hold better and then just use regular bondo and start sanding after it's "perfect." What I Want to know, is what is the better glue to use? Like I said, want to do it only once and can not afford to screw up...

  4. #4
    Sheepdog rdholtz's Avatar
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    Many times you'll find a mark on the back of plastic parts that tell you what kind of plastic they're molded from. The symbols may be by themselves, or they may appear as a number inside the recycle logo; here are the usual ones:



    1 = PolyEthylene Terephthalate
    2 = High Density PolyEthylene
    3 = Vinyl
    4 = Low Density PolyEthylene
    5 = PolyPropylene
    6 = PolyStyrene
    7 = Everything Else

    If there are no indications on the material, you'll have to do some research. You might check back through the threads about others with similar Cougars -- or Thunderbirds -- to see if they identified their bezel materials, and make a similar check on threads where people used the same screen to see what it's made from. Use this link to help you determine what you have.

    Similar materials are easy to adhere; if you have two pieces of ABS, you're in the best shape. Just this Fabrication forum for ABS glue, and you'll get a bunch of information.

    For dissimilar materials, you need to find a glue that adheres to both materials. There's an absolute wealth of good information available at Urethane Supply.

    If one of the materials is PE or PP -- my Scion dash is PE -- it's hard to find a glue because PE and PP reject most chemicals (in fact, a lot of chemical containers are PE or PP because of that). All my bezel mods have been -- and will be -- welded polyethylene; there won't be any glue. I bought the KC Welder Pro plastic welder (basically a flat-headed soldering iron) from Urethane Supply, and it produces great results with some practice. Welding would be another option for you, if your parts are similar materials.

    If you do some reading in the forums, you'll find general unhappiness with Bondo. It's the cheapo brand, and often produces cracks a few months (or even days) down the road. It's really best used only to fill small imperfections, and there are other, better brands.

    Read Nexson's thread to learn about good materials and techniques; he has a side business doing amazingly good work that looks OEM, and he divulges his materials and shows lots of photos in his thread. Also, take the time to read TurboCad6's thread; he's another master of detail, and owns a bodyshop, in addition to moderating here on MP3Car. Just those two threads will provide quite an education. By the time you work through those and any of the relevant Fabrication forum "sticky" threads, your head will be jammed with information and ideas, and -- most likely -- some new questions.

    Have fun . . .
    .
    If just enough is really good, then too much ought to be perfect.

    2006 Scion xB with in-dash Atom & Lilliput 889GL -- Worklog at http://www.mp3car.com/vbulletin/work...res-links.html
    .

  5. #5
    Maximum Bitrate BarryWoods's Avatar
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    Quote Originally Posted by rdholtz View Post

    Read Nexson's thread to learn about good materials and techniques; he has a side business doing amazingly good work that looks OEM, and he divulges his materials and shows lots of photos in his thread. Also, take the time to read TurboCad6's thread; he's another master of detail, and owns a bodyshop, in addition to moderating here on MP3Car. Just those two threads will provide quite an education.
    Or make anything we make look like crap in comparison..... They both make some of the coolest stuff look mostly effortless. Kinda like watching Norm on Saturday mornings, you think, "Hey! I can do that!" then you find out it's not quite that easy. Though you get better as you go along.
    Failure is not an option....



    It's installed by default on every version of Windows.

  6. #6
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    I really like the idea about plastic welder. Went to my local harbor freight and they have several welders, so I think I might go that route. Still need to figure out the types of plastics that I will be working with.

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