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Restoring My Original R/T hood #1044191
07/31/11 08:52 PM 07/31/11 08:52 PM
Joined: Jan 2003
Posts: 3,288
Stroudsburg, PA
Erik Offline OP
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Erik  Offline OP
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As I am finally getting back to working on my Challenger, I started to strip the hood today. After many years of sitting, some rust has pitted into the metal. What is the best way for getting it out without grinding too much metal down?

Here is a pic:


Also, s at some point in it's life, someone put hood pins on it but not in the right place so I will need to fill in the holes. Anyone have a suggestion on the best way of doing that?

Here is a pic:


Thanks!

1970 Challenger Convertible soon to be T/A convertible

Contrary to the opinions of some, I am not dumber than I look.
Re: Restoring My Original R/T hood [Re: Erik] #1044192
07/31/11 09:12 PM 07/31/11 09:12 PM
Joined: Jan 2004
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1_WILD_RT Offline
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I just cleaned up a hood with similar rust, once I'd stripped all the paint off I used Muratic Acid (Swimming pool acid) in a small garden sprayer... soak the metal down with acid & let it work for a period, maybe ten minutes, spraying more acid as needed to keep it wet... A little agitation with a brush on the worst areas then dump a box of baking soda on the hood & mix it around to neutralize the acid... Rinse throughly then use compressed air to dry all the pits... Be ready to prime the hood to seal the metal ASAP..

Looks like a crack to be welded up too..

You'll have some warpage to deal with when you weld up those hood pin holes.... Might be better to consider a AMD hood...

Last edited by 1_WILD_RT; 07/31/11 09:15 PM.
"The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."
Re: Restoring My Original R/T hood [Re: 1_WILD_RT] #1044193
07/31/11 10:52 PM 07/31/11 10:52 PM
Joined: Jan 2003
Posts: 3,288
Stroudsburg, PA
Erik Offline OP
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Erik  Offline OP
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Stroudsburg, PA
Thanks for the tip on the rust pitting. You should have seen the amount of factory putty I ground off this hood. There was quite a bit and it surprised me. It was all under the original paint, so it had to be from the factory.

This is the original 1970 hood for my car. Unfortunately, the AMD hoods are not 1970 hoods. I have an original 72-74 hood now if I can't fix this one.

1970 Challenger Convertible soon to be T/A convertible

Contrary to the opinions of some, I am not dumber than I look.
Re: Restoring My Original R/T hood [Re: Erik] #1044194
07/31/11 11:10 PM 07/31/11 11:10 PM
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1_WILD_RT Offline
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If your gonna use it hopefully you have a stud gun with the shrinking attachment.. Cut filler pieces to fill the holes & go slow welding it up.... The rust doesn't scare me, it really isn't a problem but hoods can really warp badly....

"The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."
Re: Restoring My Original R/T hood [Re: 1_WILD_RT] #1044195
08/01/11 10:13 AM 08/01/11 10:13 AM
Joined: Jan 2003
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Stroudsburg, PA
Erik Offline OP
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What is a stud gun with a shrinking attachment?

1970 Challenger Convertible soon to be T/A convertible

Contrary to the opinions of some, I am not dumber than I look.
Re: Restoring My Original R/T hood [Re: Erik] #1044196
08/01/11 05:29 PM 08/01/11 05:29 PM
Joined: Mar 2008
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Sacramento CA
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Morty426 Offline
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Quote:

What is a stud gun with a shrinking attachment?



It's code for "You better get an expert to fill those hood pin holes for you"

Re: Restoring My Original R/T hood [Re: Morty426] #1044197
08/01/11 06:37 PM 08/01/11 06:37 PM
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Danan Offline
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I recommend welding the incorrect hood pin holes first. If you go slow, you won't have much/any problem with warpage (go SLOW!). Once the hood is solid again, I like to media blast the pitted metal and then go over the entire hood with picklex 20. Let dry for 24 hours and you are ready to shoot your epoxy primer.
Re: Restoring My Original R/T hood [Re: Danan] #1044198
08/03/11 10:48 PM 08/03/11 10:48 PM
Joined: Feb 2006
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New Jersey
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69Chrgr Offline
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short of it getting Damaged in transport and the dealer fixing the hood, I dont think the hood had filler in it from the factory, nothing is 100% but I dont think the factory did body work on panels, my dad worked on the line at GM and I never heard of this there either. but anything is possible.
Re: Restoring My Original R/T hood [Re: 69Chrgr] #1044199
08/03/11 11:16 PM 08/03/11 11:16 PM
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340SIX Offline
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I agree on the acid route
Muratic is strong but works and as stated needs to be covered in soda and then washed well with Hot Water if possible.
I Use PPG DX579 and wash with laqure thinner on lots of small parts with light rust and it cleans it right up

[img]https://i234.photobucket.com/albums/ee87/fast340six/sig%20pics/2840886-340SIX-1.jpg[/img]
VP of the MPM in New Orleans
73 Dart Sport 340/ 70 challenger vert. That may still get built, If I live long enough
Re: Restoring My Original R/T hood [Re: 69Chrgr] #1044200
08/04/11 10:00 AM 08/04/11 10:00 AM
Joined: Jan 2003
Posts: 3,288
Stroudsburg, PA
Erik Offline OP
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Quote:

short of it getting Damaged in transport and the dealer fixing the hood, I dont think the hood had filler in it from the factory, nothing is 100% but I dont think the factory did body work on panels, my dad worked on the line at GM and I never heard of this there either. but anything is possible.



I guess that's possible. There were two coats of primer (one red one gray) and the yellow paint. I had never heard of two primer coats. The rest of the car is not like that.

1970 Challenger Convertible soon to be T/A convertible

Contrary to the opinions of some, I am not dumber than I look.
Re: Restoring My Original R/T hood [Re: Erik] #1044201
08/04/11 11:54 AM 08/04/11 11:54 AM
Joined: May 2008
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CA
David Lee Offline
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Fix the warpage before you do any welding. It may warp so badlythat is unrecoverable. I prefer gas welding sheet metal since I only to heat the panel once. Grinding can bring in just as much heat and warpage as the welding process itself. Also when you put a dolly underneath the weld and hit the hammer upon it you will also have an uneven surface and it can add more warpage that may be unrecoverable. With a dolly and a slapper most dings can be removed without the need of any or little filler.

Ah...so many pedestrians, so little time...
Re: Restoring My Original R/T hood [Re: David Lee] #1044202
08/04/11 08:55 PM 08/04/11 08:55 PM
Joined: Jul 2007
Posts: 309
Canal Fulton, (Akron) Ohio
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Quicksmopars Offline
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Welding those hood pin holes up a is pretty easy. Make a little circle patch for the center and copper back the small holes and weld them up. Do 2-3 tack welds then put a blow gun on it to rapidly cool the metal. Continue doing that till it's all welded. It really reduces the warpage. As for the rust pits, grind them deep and use a good rust converter.

Re: Restoring My Original R/T hood [Re: 1_WILD_RT] #1044203
08/18/11 12:04 PM 08/18/11 12:04 PM
Joined: Jan 2003
Posts: 3,288
Stroudsburg, PA
Erik Offline OP
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Quote:

I just cleaned up a hood with similar rust, once I'd stripped all the paint off I used Muratic Acid (Swimming pool acid) in a small garden sprayer... soak the metal down with acid & let it work for a period, maybe ten minutes, spraying more acid as needed to keep it wet... A little agitation with a brush on the worst areas then dump a box of baking soda on the hood & mix it around to neutralize the acid... Rinse throughly then use compressed air to dry all the pits... Be ready to prime the hood to seal the metal ASAP..



I picked up some acid last night. Do you dilute it all or use it full strength?

1970 Challenger Convertible soon to be T/A convertible

Contrary to the opinions of some, I am not dumber than I look.
Re: Restoring My Original R/T hood [Re: Erik] #1044204
08/18/11 12:24 PM 08/18/11 12:24 PM
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I use it full strength, make sure you have some baking soda cause you must neutralize the acid or you'll have problems later.... I use a little water, allot of baking soda & a scotch-brite pad.. Scrub throughly then rinse throughly with water.... Blow it dry making sure the pits are dry.. I prefer a hot sunny day so the heat helps force dry the steel... You want it sealed the same day cause the steel will be very clean & very raw, highly susceptible to rusting again...

"The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."
Re: Restoring My Original R/T hood [Re: Erik] #1044205
08/18/11 12:34 PM 08/18/11 12:34 PM
Joined: Sep 2004
Posts: 15,996
RI Deep in the rust belt
chargervert Offline
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This is the original 1970 hood for my car. Unfortunately, the AMD hoods are not 1970 hoods. I have an original 72-74 hood now if I can't fix this one.




Unless you are doing a 100% OEM restoration,you may want to consider going with the later hood. There was a reason that they put those crash relief indents in the later hoods,as the 70 hoods were crashing through the windshield and guiliteening the drivers,in the event of a front end collision. With the indents the hoods fold. If you intend to drive the car,sometimes saftey overules correctness! My neck is worth more than a few judging points!

70 Charger R/T SE 472 Hemi 70 Charger R/T convertible 70 Charger R/T V Code Sixpack 69 Charger R/T SE Sunroofcar 68 Charger 383 68 Charger 318 71 Charger R/T 70 Challenger convertible 71 Challenger convertible 71 Cuda 340 09 Challenger R/T Classic
Re: Restoring My Original R/T hood [Re: Erik] #1044206
08/19/11 01:26 AM 08/19/11 01:26 AM
Joined: Jul 2006
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Chilly Northern, Minn.
71 Charger R/T Offline
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Quote:

What is a stud gun with a shrinking attachment?



This is a stud gun with a shrinking attachment.....
Re: Restoring My Original R/T hood [Re: Erik] #1044207
08/19/11 02:49 PM 08/19/11 02:49 PM
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Myrtle Beach, SC formerly the ...
340wedge Offline
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http://autobodystore.net/Merchant2/merch...egory_Code=RCAC

I've heard good stuff about this if you have a car filled with surface rust on body shop message boards.

1971 Sassy Grass Green Duster 340
2006 Charger Daytona GoMango
Re: Restoring My Original R/T hood [Re: 340wedge] #1044208
08/19/11 05:53 PM 08/19/11 05:53 PM
Joined: Jul 2007
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Canal Fulton, (Akron) Ohio
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Quicksmopars Offline
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Duraglass the crumple zones and switch to the 70 hood latch and BAM it is now a 70 hood.
Re: Restoring My Original R/T hood [Re: Quicksmopars] #1044209
08/19/11 08:01 PM 08/19/11 08:01 PM
Joined: Sep 2004
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RI Deep in the rust belt
chargervert Offline
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chargervert  Offline
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I'm restoring my wifes 70 Plum Crazy Challenger convertible,and I bought the AMD hood because it had the crumple zones. I like her head right where it is! Thats a good idea to duraglass them!

70 Charger R/T SE 472 Hemi 70 Charger R/T convertible 70 Charger R/T V Code Sixpack 69 Charger R/T SE Sunroofcar 68 Charger 383 68 Charger 318 71 Charger R/T 70 Challenger convertible 71 Challenger convertible 71 Cuda 340 09 Challenger R/T Classic
Re: Restoring My Original R/T hood [Re: Quicksmopars] #1044210
08/22/11 12:25 PM 08/22/11 12:25 PM
Joined: Jan 2003
Posts: 3,288
Stroudsburg, PA
Erik Offline OP
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Quote:

Duraglass the crumple zones and switch to the 70 hood latch and BAM it is now a 70 hood.



That's a great idea! It will be a lot less work on the later hood I already have. And since it's not being restored as a OE gold car, I'm fine with doing that!

I'll clean up and throw the original hood in the shed as a spare.

Thanks!

1970 Challenger Convertible soon to be T/A convertible

Contrary to the opinions of some, I am not dumber than I look.
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