Home-built bumper grille ducts
#32
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Originally posted by chris_stampe
One scrape and you are fucked.
One scrape and you are fucked.
But if I do bust it some day, the fiberglass will be really easy to repair. You just sand it, lay up a couple more layers of glass, fill and repaint. Easy
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Originally posted by yearrgh
different without being loud or obnoxious
different without being loud or obnoxious
Some final touch-up filling before glass lay-up:
#36
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Fiberglass!
Here is the result of my first lay-up.
I did that in about an hour with two separate pieces of glass mat, about a cup of resin, a couple popsicle sticks and a spreader stick. It was pretty easy, just messy and smelly.
I did that in about an hour with two separate pieces of glass mat, about a cup of resin, a couple popsicle sticks and a spreader stick. It was pretty easy, just messy and smelly.
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progress
One layer of that glass mat soaked in cured resin is very stiff. I am planning three layers on all front surfaces and two for the duct insides. Then I will try to scrape off all the cardboard and put a layer or two around the openings from behind to help bond the new nose profile to the bumper.
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Thanks. The hardest part was taking the plunge and cutting the bumper. Second hardest was routing the cardboard side duct forms around the headlight motors. Everything else was pretty easy.
Astrochild7, you will probably see the finished car if you ever go to an auto-x in eugene. I am going to start making the meets down there when I get the car finished.
Astrochild7, you will probably see the finished car if you ever go to an auto-x in eugene. I am going to start making the meets down there when I get the car finished.
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hmm im curious now could i use cardboard to create a bodykit then bondo and fiber glass it? i done body work with friends before but i never considered using carboard to create a body kit entirely
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You should be using a brush to apply the resin and a squegee to thin it out and press it into the glass. (squegee also helps wet the fabric)
Other than that... Looks great!
The strength comes from the glass and how the plastic (thats what the resin is) bonds the fibers together to make a rigid structure. Excessive resin will be heavier and weaker than having a proper fiber content in the part.
Now that you have a base coat of material and it is pretty firm. Use some really coarse sand paper and smooth it out. Be sure if you use water to clean the surface following sanding that you let it FULLY dry before laying up subsequent layers. (the polyester resin absorbs water very well and is a primary cause of failure and voids)
Do the rest of the layers in as few stages as possible. You'll get better bonding of the fibers and less excess materials between the layers of glass.
If you have any other questions feel free to ask. I just had a class on re-enforced composites last fall.
Other than that... Looks great!
The strength comes from the glass and how the plastic (thats what the resin is) bonds the fibers together to make a rigid structure. Excessive resin will be heavier and weaker than having a proper fiber content in the part.
Now that you have a base coat of material and it is pretty firm. Use some really coarse sand paper and smooth it out. Be sure if you use water to clean the surface following sanding that you let it FULLY dry before laying up subsequent layers. (the polyester resin absorbs water very well and is a primary cause of failure and voids)
Do the rest of the layers in as few stages as possible. You'll get better bonding of the fibers and less excess materials between the layers of glass.
If you have any other questions feel free to ask. I just had a class on re-enforced composites last fall.
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yeah, he's got me thinking of ways to do a piece of body work myself now (bad person you ) however, I have no extra money of any sort to work with
Great work man, keep it up!
Great work man, keep it up!
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Ha ha, yeah my lay-ups are a little "wet" so far. This is my first time with glass mat as opposed to weave. I'll try that idea, Jimmi325i, thanks.
As far as making a total body kit out of cardboard, it could work if you were very careful with how good the original cardboard form was. That's a good idea about making a straight down air-dam type shape to make the nose really look better. Then you could do some mild side skirts and a little work on the rear bumper . . .
Really, all the cardboard does is temporarily exist under the first couple of lay-ups. Then I will hack it out with my die-grinder and paint removing wheel.
As far as making a total body kit out of cardboard, it could work if you were very careful with how good the original cardboard form was. That's a good idea about making a straight down air-dam type shape to make the nose really look better. Then you could do some mild side skirts and a little work on the rear bumper . . .
Really, all the cardboard does is temporarily exist under the first couple of lay-ups. Then I will hack it out with my die-grinder and paint removing wheel.
#49
To do up the whole body ya'd probably have to go for some styrofoam or sumpin' -- just imagining trying to do a lip or sumpthing like that with cardboard might be impossible.
The other problem might be keeping things perfectly symetrical.
Nice work, by the way!
The other problem might be keeping things perfectly symetrical.
Nice work, by the way!
Last edited by rotard; 04-05-03 at 11:57 AM.
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Got some more work done since yesterday:
I tried pouring the resin on the form first, spreading it around with a squeegie (for bondoing), and placing the glass mat onto it this time. Then I squeegied the excess resin around until the piece was soaked with it but not wet on the surface, and it worked better than my old tecnique of putting the glass on first, then the resin.
I used less resin this time and the glass mat didn't get messed up at all. Usually I end up catching the fibers when trying to soak the resin into the glass while spreading it around.
Anyone wondering if you have what it takes to do fiberglass work, just buy some glass mat, finishing resin and build something. You will see how easy it is. Just be sure to get some gloves!
I tried pouring the resin on the form first, spreading it around with a squeegie (for bondoing), and placing the glass mat onto it this time. Then I squeegied the excess resin around until the piece was soaked with it but not wet on the surface, and it worked better than my old tecnique of putting the glass on first, then the resin.
I used less resin this time and the glass mat didn't get messed up at all. Usually I end up catching the fibers when trying to soak the resin into the glass while spreading it around.
Anyone wondering if you have what it takes to do fiberglass work, just buy some glass mat, finishing resin and build something. You will see how easy it is. Just be sure to get some gloves!