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  • Bondo Fiberglass Body Filler

    Hey guys,

    I'm new to the hobby, but fairly solid with computers. I want to build a custom enclosure for my carpc, making kind of a fancy custom enclosure. I actually have a can of bondo fiberglass body filler that I purchased a few months back to repair a bumper. Found out the bumper was urethane and not fiberglass so it wouldn't work. I never used it, it's still sealed but was too lazy to go back to return it.

    Question is, will this material work to create a fiberglass enclosure using the traditional methods of making a mold, fleece? Anyone have experience using this material? Might as well use it and not let it go to waste...

  • #2
    No you will need fiberglass resign and then after you shape it and need to smooth it you can use the can of bondo

    Just to let you know I am a 20+ year car audio veteran

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    • #3
      Surely you have some old PC cases lying around? That's what I use for any pieces of sheet metal I need. I recently built a custom case for my truckputer by cutting and bending some into the size I needed.

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      • #4
        Cool thanks for the information. I'm a newbie but getting into the hobby. Done lot of installs on my car and friends cars so i'm getting pretty decent. Never tried my hand at fiberglass, we'll see how it goes. There's tons of info on this site and others but any product recommendations on Fiberglass resin and where to get it? I live in DC so there's not many small shops that carry this kind of stuff... will Home Depot/Lowes carry decent products?

        Also seen a lot of people using fiberglass cloth or mat. Is this necessary for something thats not really going to take any weight? Just using it to make an enclosure for the CarPC. Don't want to spend a whole lot of money because if I fail, then I'll make an enclosure out of plexiglass or some other material.

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        • #5
          Barnyard - great tip! Do you have any pictures of your completed install?

          I do have the old case but it's kinda heavy and bulky, I want to make something a little more sleek.

          Right now I have 2 subs in a custom enclosure in my '04 G35. The fit perfectly against the back wall of the trunk. I want to make a sleek enclosure to place directly in front of the subs and will be the centerpiece of the trunk.

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          • #6
            Not the best pics in the world, but you get the idea:
            Attached Files

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            • #7
              thanks for posting the pics.... i'll have to mess with the old case tonight to see if i can come up with something....

              i do want to try my hand at fiberglass and see where i get with it.

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              • #8
                Te best resin in the industry is US Composites in Florida which can be ordered from their web site. B440 seems to be the resin of choice for what these types of projects. They ahve alot of other cool stuff on their site too, so have alook around.

                Get some good sanding blocks as well like Motorguard brand. Try to stay away from anything with the word Bondo on it, your quality of work & level of frustration will improve.

                Try to pick a nice day so your project can go off outdoors without smelling up the garage! Most of all have fun and make sure you wear a mask & gloves.
                Cheers
                My 2007 Ford F350 Work Log located HERE

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                • #9
                  Phil thanks for the tip I'll definitely check it out.... although i'm not in as cold of a place as canada... i am in 18-20 degree weather now.... nice days are too far out..... garage is where it's gonna have to be maybe with a heat fan blowing out the fumes lol

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                  • #10
                    Originally posted by Ronjon17 View Post
                    Phil thanks for the tip I'll definitely check it out.... although i'm not in as cold of a place as canada... i am in 18-20 degree weather now.... nice days are too far out..... garage is where it's gonna have to be maybe with a heat fan blowing out the fumes lol
                    If it's a detached garage, of course, no issue, but if it's atatched to the house, especially like mine where there are 2 bedrooms over the garage, trust me, it's going to get nasty.

                    If you built yourself a booth out of abs pipe and plastic walls that could be folded up when not in use and added fans, vents with the exhaust outside, it might be OK.

                    I have painted in the garage as well as done glass layup and trust me, the resin is 10x worse that the paint and last alot longer while it goes off.

                    It depends how large the project is too, I just did my console and that was 3 gallons of resin in about 5 layups and outdoors was the only answer. And yes the weather got cold here too about 3 weeks ago so it's just sitting now.
                    My 2007 Ford F350 Work Log located HERE

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                    • #11
                      Man that's depressing.... I don't want to work out in the cold!

                      What do you guys think about using a high quality plywood for an enclosure? Does this pose a fire hazard or do you think it's okay as long as the CPU is well ventilated?

                      I actually have some left from another project I was working on. I'm thinking of making the box out of that quickly then mess with the fiberglass come spring time.

                      I have about 5 case fans from old CPU's and I'm fairly handy at manipulating wood. I've got an '04 G35 so I'm thinking if I make the enclosure with a intricate shape (more than just a box), on top cut out a G35 or Infiniti Logo, paint it to match the trunk interior or a color that contrasts, then flood the interior with led bulbs so the G35 Logo lights up (probably put plexiglass over this). Thinking about using all 5 case fans to provide tons of ventilation.

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                      • #12
                        Wood can be heavy, in a G35...be careful. The hood and doors are aluminum to save what, 20Lb each...then you add 40lb past the rear axle...I don't know, just saying. You said plywood that's smart, ive seen a Corvette full of mdfs...Then again maybe fiberglass can be even heavier...I have yet to do it myself, if I were you I would do it to learn that stuff. :-)
                        Worklogs: 08 Sequoia Platinum Carputer (In Progress!)
                        Skin: MetroSex on the Beach preview

                        07 Infiniti Fx35 (done!) & 06 Infiniti M35 (gone...)

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                        • #13
                          Originally posted by PhilG View Post
                          If it's a detached garage, of course, no issue, but if it's atatched to the house, especially like mine where there are 2 bedrooms over the garage, trust me, it's going to get nasty.

                          If you built yourself a booth out of abs pipe and plastic walls that could be folded up when not in use and added fans, vents with the exhaust outside, it might be OK.

                          I have painted in the garage as well as done glass layup and trust me, the resin is 10x worse that the paint and last alot longer while it goes off.

                          It depends how large the project is too, I just did my console and that was 3 gallons of resin in about 5 layups and outdoors was the only answer. And yes the weather got cold here too about 3 weeks ago so it's just sitting now.

                          +1

                          i haven't done fiberglass, but i have applied bondo to some things in my basement-- the whole house smelled like it for days..after that, i now try to do things like this in a detached garage..
                          My OLD 2001 Mitsubishi Eclipse GT:
                          "The Project That Never Ended, until it did"


                          next project? subaru brz
                          carpc undecided

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                          • #14
                            Fiberglass won't be heavier. It is incredibly light and strong. The curvier the stronger. Large flat areas should be done in another material or need ribbed reinforcing added (you could use thick rope glassed in as ribbed reinforcing). Also note the resin itself is heavy, but your form shouldn't be a pool of resin.

                            When done properly:
                            -hit the stretched cloth with resin, let it harden. It won't get 100% immovable even at fully cured because theres no glass. This is fine.

                            -Now lay up one layer of glass quickly so resin doesn't get thick. Let this fully harden. Now this will be hard to the touch. Not weight bearing but hard enough where you can press a bit. This is important for the subsequent layers.

                            Now when you add more layers, use a roller to squeegee out excess resin. The strength is in the glass not the resin and the resin (liquid weight) is heavy. You want as little of this as possible.

                            Oh yeah, do it outside. The smell will even stick to your clothes.

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                            • #15
                              Yea I definitely am going to try out the fiberglass, but I'll take all of your guys advice and do it outside. Today it's 20 degrees and snowing in MD, so I'm going to hold off on the outdoor work for a few more months until it gets warmer.

                              I can cut the plywood in my garage tho and weight shouldn't be an issue, this isn't very thick plywood just 1/4" and its fairly light weight. I can't imagine the box will add anymore than 10 lbs at the most expecially since I don't intend on making it very big.

                              I'm just worried about heat issue, will this pose a firehazard? I am assuming no since most computers will shutdown at temperatures over 150 degrees, definitely not hot enough to cause a fire. Electrical components inside wood tho still scares me... even tho my amps right now are tucked behind my seat and probably pose a greater of a risk next to carpet...

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