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Fixing Broken Plastic

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Old Mar 20, 2012 | 03:21 PM
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From: Colorado
CO Fixing Broken Plastic

I bought some TII mirrors for my NA->TII Project car and they they are a little chipped, specifically the driver side is missing a lot of the edge like some one hit a wall or something

Anyhow, what is available to mold and paint that I can use to recreate the missing chunk? I was thinking some kind of mold-able plastic or putty that hardens.

I also have a ton of trim parts that while taking the car apart broke all to hell, I was going to use epoxy to seal them back together but what do I use to fill the gaps? I plan on painting/dying the burgundy to black with some stuff(TBD). Saw a nice build thread that the guy restored some of his parts with some vinyl paint, looked very nice.
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Old Mar 20, 2012 | 03:56 PM
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From: Florida
FL Idea

use perhaps a bit of tape to get the shape that you want and fill the areas with some fiberglass. Then sand appropriately.
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Old Mar 20, 2012 | 04:44 PM
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From: Colorado
Originally Posted by Leonel95
use perhaps a bit of tape to get the shape that you want and fill the areas with some fiberglass. Then sand appropriately.
I have never done anything with fiberglass, how easy is it to work with?
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Old Mar 20, 2012 | 05:29 PM
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From: New Hampsha
Originally Posted by shadowghost21
I have never done anything with fiberglass, how easy is it to work with?
not hard to work with, but not fun. use gloves, and when it comes to sanding it, put baby powder on your arms to clog your pores or the fiberglass dust will get in there and SUCK for about a week.
i would suggest just some bondo if im correct in imagining your cracks/dings. pics would help
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Old Mar 20, 2012 | 07:18 PM
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From: Central Florida
easiest way to repair it is to replace it.
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Old Mar 20, 2012 | 07:30 PM
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From: New Hampsha
^ that too, ive had to buy a few missing/cracked plastics from ebay, and other places. but ive found EVERYTHING ive needed and got all my plastics back to 100%
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Old Mar 20, 2012 | 09:31 PM
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From: Colorado
Originally Posted by Karack
easiest way to repair it is to replace it.
I guess but Just about ever screw post gets broken on the steering wheel cover and instrument panel surround. In general all the screw posts. I was going to get brass tube pour something(that is the question) and then epoxy it to the missing screw posts. Then drill pilot holes for the screws.

I'll try the fiberglass method on my mirror but just looking for all the other methods I can before starting that.
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Old Mar 21, 2012 | 01:30 AM
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I haven't tried this yet, but you could you scale modeling putty. Place appropriate amount of putty. Sand, prime,paint done. I'm not sure about how much abuse or force it could take b/c this putty is meant for modeling, not actual cars. Just an idea to throw out there though.
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Old Mar 21, 2012 | 08:23 AM
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From: Jax, FL
Harbor Freight makes a plastic welder. Go get one and report back!
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Old Mar 21, 2012 | 09:09 AM
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From: Colorado
Originally Posted by MIDNFauciUSN
Harbor Freight makes a plastic welder. Go get one and report back!
I do live right next to one I'll swing by this week and see what they have. I might also look into the modeling putty.
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Old Mar 21, 2012 | 09:27 AM
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From: Austin
If the missing chunks arent too big you can try some epoxy putty which you can find at Lowes or HD. It is easy to work with and mold, dries hard as a rock, is easily sanded and sticks to plastic well. You'll want to use wax and paint remover or TSP to clean your plastic parts, sand bevels on the inside edges with 80 grit to provide bite and more surface area, and go to town. For bigger areas you'd need fiberglass.
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