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Thread: 55 Wagon Progress
          
   
   

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  1. #1
    MP&C's Avatar
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    Thanks guys!!

    Next job for E was to add some sound deadening to the inside of the door skins...








    Behind each of the speaker mounts we added a section of Dynaliner…








    She did a good job of that, wait until she sees how much more we have to go!
    Robert

  2. #2
    40FordDeluxe's Avatar
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    Is the Noico the same stuff you can get off Amazon?
    Ryan
    1940 Ford Deluxe Tudor 354 Hemi 46RH Electric Blue w/multi-color flames, Ford 9" Residing in multiple pieces
    1968 Corvette Coupe 5.9 Cummins Drag Car 11.43@130mph No stall leaving the line with 1250 rpm's and poor 2.2 60'
    1972 Chevy K30 Longhorn P-pumped 24v Compound Turbos 47RH Just another money pit
    1971 Camaro RS 5.3 BTR Stage 3 cam, SuperT10
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    MP&C's Avatar
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    That’s where the owner bought it from.
    Robert

  4. #4
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    BTW... hard copy, coffee table edition (over sized)
    .
    Education is expensive. Keep that in mind, and you'll never be terribly upset when a project goes awry.
    EG

  5. #5
    MP&C's Avatar
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    Progress pics from last night... Yep, we've been block sanding..





    Using Evercoat 416 to address the few low spots..












    Honing up on my painting skills with brush on seam sealer










    Today's lesson is on media blasting and stretch damage that occurs. Here’s what a sand blaster will do to a roof skin when blasting the braces underneath.











    Our blaster was doing the brace from underneath/inside and the inadvertent stray media hitting the adjacent roof skin stretched it, pulling it inward toward the media stream . On the outside the “unstretched” area shows as a high spot, the stretched part that needs shrinking is seen as a low. So if you must media blast any braces or internal structure, block off the skin next to it so no media touches it. Save yourself the extra body work.


    We fixed the lows by locating the exact spots on the inside that needed shrinking and tapping outward into a small shot bag. To locate, a rare earth magnet is placed outside on the roof skin in each low spot, and some grinding dust finds the magnet on the inside where we can mark the perimeter both inside and out, and work with one person on either side to remove the lows. (See video, magnet marks highs or lows, it doesn’t care) For multiple lows, mark both sides of all spots and number them, so you can move from one spot to the next, calling out the number desired to your shrinking assistant. If your car is too clean to have grinding dust, look under your bench grinder.


    Magnet use video:


    https://www.youtube.com/watch?v=HHHTKiWZ2Xo


    Note on the inside roof skin picture the multiple numbered circles where we found low spots to address.


    .
    Robert

  6. #6
    40FordDeluxe's Avatar
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    More excellent work! Have you seen the attachments for pressure washers that inject sand to sand blast? I'm thinking that would be pretty nice on sheet metal. No heat so hopefully no warpage and no dust too.

    .
    Ryan
    1940 Ford Deluxe Tudor 354 Hemi 46RH Electric Blue w/multi-color flames, Ford 9" Residing in multiple pieces
    1968 Corvette Coupe 5.9 Cummins Drag Car 11.43@130mph No stall leaving the line with 1250 rpm's and poor 2.2 60'
    1972 Chevy K30 Longhorn P-pumped 24v Compound Turbos 47RH Just another money pit
    1971 Camaro RS 5.3 BTR Stage 3 cam, SuperT10
    Tire Sizes

  7. #7
    MP&C's Avatar
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    Any heat noticed in normal blasting is a side effect of the peening action. Stretching has already occurred long before the heat shows up, so don't buy into the pressure washer hype too deep. They can cause just as much damage. Think of all that media as little hammer heads beating the sheet metal. In the case of our roof, it was being blasted from the bottom side to clean off the roof brace. The media that struck the roof skin to the sides of the brace was peening the sheet metal, in essence causing it to stretch the skin on the surface that the media is striking. This stretch on the one side of the sheet metal then causes the panel to balloon inward, TOWARD the media source, which on the outside appears as a low. Larger media = bigger hammers. Too much air pressure = a harder swing on those hammers. Whether the media is propelled by air, water, or anything else you can find, too much swing of too big a hammer will indeed stretch, despite the "water keeping the panel cool". Have seen it on hoods, trunk lids, you name it. Someone attempts to clean off an inner structure and hits the sheet metal from the bottom, and you have an instant low right where that brace/structure ends.


    Here is a sandblast test I did on a trunk lid to learn up on the subject...


    Repairing Sandblast Damage - The 1947 - Present Chevrolet & GMC Truck Message Board Network


    .
    Last edited by MP&C; 09-05-2019 at 03:27 AM.
    Robert

  8. #8
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    As usual - a great and interesting read. I learned a lot and won't ever look at a simple dent in the same way!!!

    Thank You Robert, for sharing your knowledge... with us mere mortals!

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    i use cardboard inside doors and such when blasting. lot of damage is done by blasting inside .
    that blast attachment for pressure washer is nothing new. one came with a washer i bought years ago. good way to destroy a car and make it a rusty mess .

  10. #10
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    Thanks again Mike. The quality of the build on the 55 makes me want to put Rita in the crusher LOL. I did a fair amount of siphon media blasting on Rita on the edges and corners and stuff. I stayed away from flat parts of anything, that being said I still ended up with some distortion on the roof or someone used it for a step ladder, I'm not sure what happened first. Very possible over the course of 70 years it got used as a step ladder.
    Seth

    God cannot give us a happiness and peace apart from Himself, because it is not there. There is no such thing. C.S.Lewis

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    Quote Originally Posted by 53 Chevy5 View Post
    Thanks again Mike. The quality of the build on the 55 makes me want to put Rita in the crusher LOL. I did a fair amount of siphon media blasting on Rita on the edges and corners and stuff. I stayed away from flat parts of anything, that being said I still ended up with some distortion on the roof or someone used it for a step ladder, I'm not sure what happened first. Very possible over the course of 70 years it got used as a step ladder.

    More than likely that someone or someones used it to set on so they could see something they couldn't see clearly from the ground. Used to see a lot of that at drag races years ago.
    Ken Thomas
    NoT FaDe AwaY and the music didn't die
    The simplest road is usually the last one sought
    Wild Willie & AA/FA's The greatest show in drag racing

  12. #12
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    I've been known to toss a bale (or two) of hay on the roof to finish off a field.
    OK, OK... maybe it was 3 or 4.. LOL

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    Ok on the pressure washer blaster. Is there any safe media to use to keep war-page down to a minimum? Baking soda, walnut shells? I ask because I fell into another project and I am trying to figure out the best way to get the surface rust off without screwing it up.

    .
    Ryan
    1940 Ford Deluxe Tudor 354 Hemi 46RH Electric Blue w/multi-color flames, Ford 9" Residing in multiple pieces
    1968 Corvette Coupe 5.9 Cummins Drag Car 11.43@130mph No stall leaving the line with 1250 rpm's and poor 2.2 60'
    1972 Chevy K30 Longhorn P-pumped 24v Compound Turbos 47RH Just another money pit
    1971 Camaro RS 5.3 BTR Stage 3 cam, SuperT10
    Tire Sizes

  14. #14
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    Quote Originally Posted by 40FordDeluxe View Post
    I fell into another project and I am trying to figure out the best way to get the surface rust off without screwing it up.

    .
    Noooooooo! I want to see the 40 live!
    Seth

    God cannot give us a happiness and peace apart from Himself, because it is not there. There is no such thing. C.S.Lewis

  15. #15
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    Quote Originally Posted by 53 Chevy5 View Post
    Noooooooo! I want to see the 40 live!
    Yeah, What he said!!

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