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Plastic welding.....

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Old Feb 13, 2025 | 12:06 PM
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Default Plastic welding.....

I bought a cheap little plastic welding kit off of Amazon and it has been really useful repairing some things on the Vette. As much brittle plastic is in these cars I highly recommend getting one. Today I repaired the driver's fender/ battery cover I picked up to replace my broken one. I found a crack in it so I'll show how I repaired a factory piece that's kinda hard to find. Here is the kit I got for around $30. Comes with tools, different types of plastic welding rods, and some other plastic repair items.


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Old Feb 13, 2025 | 12:09 PM
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Here is the crack and damage we are going to fix on the bottom of this fender.

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Old Feb 13, 2025 | 12:13 PM
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I start by melting a wire into the plastic to help hold it together where the crack starts.

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Old Feb 13, 2025 | 12:16 PM
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Next we'll add some material to build back up some damage on the other side.

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Old Feb 13, 2025 | 12:19 PM
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After sanding and smoothing what's been done so far I'm going to melt this section of metal screen into the rest of the crack.

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Old Feb 13, 2025 | 12:21 PM
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Screen material melted into the existing plastic.

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Old Feb 13, 2025 | 12:26 PM
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Added a little new plastic to the screen reinforced area and low spots in the opening. This area is on the inside so it doesn't have to be perfectly smooth. I still have to paint this panel so it will look fine when that's done. I don't think I have to worry about that crack anymore. This whole process took about 20 minutes.
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Old Feb 13, 2025 | 04:55 PM
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Wow. That's great! Thanks for the demo. I'm thinking about giving it a try!
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Old Feb 13, 2025 | 05:05 PM
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Almost broken off door panel tab.
Almost broken off door panel tab.
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Old Feb 13, 2025 | 05:06 PM
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Wires melted in to hold.
Wires melted in to hold.
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Old Feb 13, 2025 | 05:08 PM
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Finished. Not pretty, but functional. Saved a door panel.
Finished. Not pretty, but functional. Saved a door panel.
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Old Feb 13, 2025 | 07:40 PM
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Old Feb 14, 2025 | 07:16 AM
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Great job! I bought a very different kit and my results were terrible. So I've been using epoxy on all that type of stuff.
Can you post a link to the kit you bought?
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Old Feb 14, 2025 | 07:25 AM
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I'll try to find it. I've had it for a while now
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Old Feb 14, 2025 | 07:41 AM
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Inspiring! A weekend project if I can find one of those suckers..
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Old Feb 14, 2025 | 07:44 AM
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Originally Posted by Polo Vert
I bought a cheap little plastic welding kit off of Amazon and it has been really useful repairing some things on the Vette. As much brittle plastic is in these cars I highly recommend getting one. Today I repaired the driver's fender/ battery cover I picked up to replace my broken one. I found a crack in it so I'll show how I repaired a factory piece that's kinda hard to find. Here is the kit I got for around $30. Comes with tools, different types of plastic welding rods, and some other plastic repair items.

I just found this one on Amazon, I bought it and iut will be at my house when I get home from work. Outstanding post mate!
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Old Feb 14, 2025 | 07:57 AM
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Nice bonding the repair, and yes there is lot brittle parts on these C4 with parts not available any longer.
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Old Feb 14, 2025 | 08:49 AM
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I have a similar kit that I bought off of Amazon as well. I've used it for quite a bit of repairs on my Corvettes and my Porsche 944. The plastic is old and brittle on these cars but it does repair well with the proper tool and technique.
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Old Feb 15, 2025 | 02:18 AM
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I just use a soldering iron. I use plastic from old bezels that are too far gone for filler material. You can use wire, paper clips, really fine nails or just about any thin metal to add support by burying it in the plastic with heat.
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Old Feb 15, 2025 | 09:55 AM
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Wire screen mesh work good for reinforcement too. Cut some with tin snips and heat it up with the iron and it will sink into the plastic
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