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Unread 10-09-2012, 09:26 PM   #1
J33PNSL33P
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Remove powdercoat from threads?

Hey guys I just got my new jcr bumpers powder coated and on the front one they didn't mask the bolts completely. I can't get a single nut on. Is there an easy fix so I can put my bumper on? Or do I have to go back and deal with the shop that did the powder coating?
Thanks for the help

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Unread 10-09-2012, 09:36 PM   #2
Doctor7474
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Run it through the right sized die?
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Unread 10-09-2012, 10:15 PM   #3
J33PNSL33P
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This is what I have the bolts are attached to the bumper and it looks like they didn't mask the ends of the bolt so I can't even start a nut
image-3035648958.jpg   image-4289198762.jpg  
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Unread 10-09-2012, 10:42 PM   #4
Coolcatracing
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A die will cut that right off. If you take some sand paper it will knock enough down to get the nuts safely started but won't affect the metal.
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Unread 10-10-2012, 01:12 AM   #5
SubAtomicGenius
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Carefully chip it off with a hammer and a punch/screwdriver/chisel? Wire cup brush on a drill? 10 seconds tops, most likely it is a grade-8 bolt and it will be pretty hardy.
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Unread 10-10-2012, 01:19 AM   #6
1222
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I second using a stiff wire wheel on a drill.
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Unread 10-10-2012, 07:05 AM   #7
J33PNSL33P
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All 16 bolts are covered and some will be very difficult to get at with any large abrasive without taking coating off the rest of the bumper. Ill call the shop today and see if they have an easy way to get it off before I attack it.
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Unread 10-10-2012, 07:10 AM   #8
jwmbishop
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Just a cheap tap and a die set will give you what you need to chase threads. I wouldn't use the cheapoes to make new threads but they are great for chasing! I have two sets for that reason - one I bought at a tool flea market and one I bought in pieces from Fastenal.

If you have an extra nut you could cut into it with a cutoff wheel - slice it almost in half slightly off center - and use that.
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Unread 10-10-2012, 09:12 AM   #9
J33PNSL33P
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The shop said the same thing. Either use a wire wheel on a dremel, or sand the excess and run a thread chaser up the bolt. I guess I'll be stopping off at the hardware store after work.
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Unread 10-10-2012, 10:15 AM   #10
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Nice of them to volunteer (offer) to do it for you since they screwed up on all 16 of them. I sure wouldn’t have anything powder coated by them again. I can see where maybe one of the bolts was missed being covered but every one of them, no way.
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Unread 10-10-2012, 10:22 AM   #11
J33PNSL33P
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He said they leave the I ends if all the bolts because most people like the ends protected with powdercoat. But it filled the topmost threads in completely making starting a nut impossible. I was hoping they would volunteer but my experience with most things is u only want a third party touching it ONCE. If they clean the bolts off they will damage something else on the process. I would rather do it myself.
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Unread 10-10-2012, 10:39 AM   #12
mike_baggly
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Quote:
Originally Posted by J33PNSL33P View Post
He said they leave the I ends if all the bolts because most people like the ends protected with powdercoat.
That's a ridiculous statement covering for shoddy work.
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Unread 10-10-2012, 10:48 AM   #13
1222
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I agree with you about doing it yourself versus someone who could care less about being careful with such a procedure. It’s just that if they would have at least offered to make things right it would have made you feel a bit better about what happened. Anyhow, if you ever have anything powder coated again that involves nuts, bolts or studs you can discuss your concerns with whomever beforehand and avoid a repeat.

By the way, I’ve been in the same situation as you but not to the extent that you’re having. Hope all goes well in cleaning up the threads.
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Unread 10-10-2012, 10:51 AM   #14
gwar11d2
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Nice. Let's see a photo of the whole bumper Which one did you get?
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Unread 10-10-2012, 11:23 AM   #15
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Quote:
Originally Posted by 1222 View Post
i second using a stiff wire wheel on a drill.
x2
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