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David_Doan
04-14-2013, 08:19 PM
So, the wheel arches in my bonnet have the usual cracks. The common fix I have read about is to weld in 1/4" rebar. I don't weld and the local hardware stores don't carry 1/4″ rebar. I substituted 1/4″ all-thread for the rebar and JB-Weld for welding. I thought the threaded bar would work better with JB-Weld than smooth bar. I used about half a dozen pairs of vice-grips to hold the all-thread in place while gluing. When it dries I'll remove the vice-grips and glue the rest of the area. Hopefully it will hold. You can't tell in the pic, but I did sand the area to be glued with coarse sandpaper.

Update: The JB weld held solid.

https://lh6.googleusercontent.com/-tsOPvEXwznI/UWsx0rFoexI/AAAAAAAAIQc/8mvxmEtQh6g/s912/DSC_0514.JPG

While waiting for the JB-Weld to dry, I polished one of the windshield posts.

Update: when i did the 2nd post, i was not happy with the shine. Bought more sandpaper 800, 1000, 1500. These last steps to not take long, but improve the looks significantly. Shiny with no lines or scratches at all.

https://lh3.googleusercontent.com/-xe1HOeOt2Lc/UWsx1GJrxlI/AAAAAAAAIQk/TBHNhptH3r0/s912/DSC_0518.JPG

Jim_Gruber
04-14-2013, 09:09 PM
David,

That sure looks like and effective alternative to welding and burning holes through some thin metal like I did when I first started to try and fix Bugsy I's bonnet and the thread gives the JB Weld something to hang on to. My windshield posts on Bugsy II look like your before. Nice to know these clean up.

Jim_Gruber
04-14-2013, 09:10 PM
While you've got bonnet where you can take a good look at it take a look at all of the braces up in the front. around the radiator opening. Typically you will find rust in there. And if you are forward tilting want to make sure that area is strong.

Guest
04-14-2013, 09:55 PM
I awalys test stuff like that afterwards before installation to make sure it'll hold. I can never get JB to stick to anything. Might be a good idea to try and pry up the ends to make sure it will hold.

David_Doan
04-14-2013, 10:00 PM
That sure looks like and effective alternative to welding and burning holes through some thin metal like I did when I first started to try and fix Bugsy I's bonnet and the thread gives the JB Weld something to hang on to. My windshield posts on Bugsy II look like your before. Nice to know these clean up.

That's the great thing about aluminum, with enough effort you can always make it look great. I know they are supposed to be painted, but I love the look of polished aluminum. Especially on a car from the 50's, I love the metal-retro look.


While you've got bonnet where you can take a good look at it take a look at all of the braces up in the front. around the radiator opening. Typically you will find rust in there. And if you are forward tilting want to make sure that area is strong.

Mine has little rust, but I am going to do a little reinforcement.

David_Doan
04-14-2013, 10:04 PM
I awalys test stuff like that afterwards before installation to make sure it'll hold. I can never get JB to stick to anything. Might be a good idea to try and pry up the ends to make sure it will hold.

Yep, I chickened out on taking the clamps off tonight, I'm going to let it set up for the full 24 hours. (it will actually be a week since I'm headed out of town for work.) I've had decent luck with JB-Weld with proper prep. I sanded the wheel arches with 60 grit sandpaper until the paint was gone.

paulsherman
04-15-2013, 12:14 PM
Windshield Posts::Did you strip them with something (oven cleaner) before you polished?

nomad
04-15-2013, 12:47 PM
I believe that only the original post's for the press stud 58 windshield were painted. All the later were just Al, polished. PO had mine chromed and it is flaking.

Kurt.

David_Doan
04-15-2013, 01:06 PM
Windshield Posts::Did you strip them with something (oven cleaner) before you polished?

I have tried that in the past without success. What always works is sandpaper. Start at 60 or 80 grit to knock off the anodizing then work up to 600 (or however high you want to go). I used 60, 100, 180, 400, 600. Most of the real work goes on at 180 grit. Make sure all the rough marks from the coarse sandpaper are gone before you move on to 400 and higher. At 600 is where you will realize anything you missed and you will have to go back to 180.

Do not use a grinding wheel or a wire-brush on AL. The grinding wheel will clog. The wire brush will make it shiny but melts the surface leaving a rough, but shiny texture. For really deep scrapes or imperfections, a file works well.

Depending on how much gloss you want 0000 steel wool can also be used for the final shine. I prefer 600 or 800 grit sandpaper, then Mothers Aluminum Polish. the Mothers will make it look awesome.

Jim_Gruber
04-15-2013, 01:23 PM
So a sanding block or just by hand?

Rut
04-15-2013, 01:32 PM
Bead blasting gives a great finish as well. It's important to follow every step in the sanding process as David says to get a good quality result.
Rut

Guest
04-15-2013, 01:43 PM
Using lye as a bath will strip off the anodizing making it much easier to sand. Depending on condition, you may be able to skip 60/80 grit if soaked in lye first. I once stripped the anodizing of a 1911 frame using just sandpaper. MAN, was that a PITA!

Jim_Gruber
04-15-2013, 01:54 PM
So Lye as in - Oven Cleaner? Or what would I know it as?

David_Doan
04-15-2013, 01:57 PM
By hand or with a sanding sponge. If you're careful you can use a flap-wheel to knock off the anodizing.

bug_sixty
04-15-2013, 02:24 PM
Heh guys the OEM plating is not that expensive....fixin the pits and scratches is

bug_sixty
04-15-2013, 02:29 PM
Anodizing leaves a special look not the same as chroming

OopsClunkThud
04-15-2013, 02:48 PM
running through the dishwasher seems to take the anodizing off my cook wear. What? no dear, I would never run car/scooter parts through the dishwasher, I was just making an observation.

I think chroming aluminum is immoral.

bthompson
04-15-2013, 08:34 PM
I'm very interested in seeing how the allthread/JBWeld experiment goes...I have to reinforce my arches very soon too.

Guest
04-15-2013, 08:59 PM
So Lye as in - Oven Cleaner? Or what would I know it as?

Drain cleaner. Red Devil is one IIRC. Draino too.

AN5Sprite
04-15-2013, 11:12 PM
Drain cleaner. Red Devil is one IIRC. Draino too.

Another source of Lye here: pure, cheap, AND you can make pretzels with it! (that's what I do)
https://www.essentialdepot.com/servlet/the-2/2-lbs-Food-Grade/Detail

Jim_Gruber
04-16-2013, 07:48 AM
Thanks guys. Draino is cheap and at Kroger. Cleaning up those are way down the road.

Guest
04-18-2013, 04:29 PM
Another source of Lye here: pure, cheap, AND you can make pretzels with it! (that's what I do)


Petzels with lye? Bet that'll clean out yer pipes. :jester:

George Zeck
04-20-2013, 10:32 AM
Do you / should you do anything for a protective coating? They look awesome!

Tx-

George

David_Doan
04-20-2013, 10:36 AM
Do you / should you do anything for a protective coating? They look awesome!

Tx-

George

I want to, I've not decided yet. Best idea so far is https://www.sharkhide.com/

Guest
04-20-2013, 12:11 PM
I want to, I've not decided yet. Best idea so far is https://www.sharkhide.com/


$65 a quart:eeek: I've been wondering about using sodium silicate for an aluminum sealer.

David_Doan
04-20-2013, 12:35 PM
$65 a quart:eeek: I've been wondering about using sodium silicate for an aluminum sealer.


Hence the "I've not decided yet". There's a downside to every solution.

2 years ago I made an aluminum handle for my mailbox. I just shined it up and stuck it on. It self anodized in the weather and always looks good. The aluminum trim on my garaged car did not fare as well. I wish I could reproduce what happened to the mailbox handle.

Jim_Gruber
04-20-2013, 12:36 PM
Kelly, Like all of us have some of that on our shelves.:rolleye: How about a more common name please. What's wrong with Mother's aluminum polish/wax?

Trevor Jessie
04-20-2013, 12:45 PM
Sodium Silicate "water glass"

David_Doan
04-20-2013, 01:11 PM
Sodium Silicate "water glass"

I spent some time searching about this stuff. Nothing about a protective coating for aluminum. Apparently, if you pour it in the crankcase, your motor is guaranteed to be dead.

David_Doan
04-23-2013, 12:41 AM
I'm very interested in seeing how the allthread/JBWeld experiment goes...I have to reinforce my arches very soon too.

Worked great, they are solid!

David_Doan
04-23-2013, 12:44 AM
I have tried that in the past without success. What always works is sandpaper. Start at 60 or 80 grit to knock off the anodizing then work up to 600 (or however high you want to go). I used 60, 100, 180, 400, 600. Most of the real work goes on at 180 grit. Make sure all the rough marks from the coarse sandpaper are gone before you move on to 400 and higher. At 600 is where you will realize anything you missed and you will have to go back to 180.

Do not use a grinding wheel or a wire-brush on AL. The grinding wheel will clog. The wire brush will make it shiny but melts the surface leaving a rough, but shiny texture. For really deep scrapes or imperfections, a file works well.

Depending on how much gloss you want 0000 steel wool can also be used for the final shine. I prefer 600 or 800 grit sandpaper, then Mothers Aluminum Polish. the Mothers will make it look awesome.

Worked on the other post today. Was not happy with the shine at 600 grit. Went and bought 800, 1000, and 1500. The last three grits don't take long and they help a lot, it was worth it.

mightymidget
04-24-2013, 05:06 PM
auto paint shops sell an epoxy glue for glueing metal panels together.

it is under the 3m brand. it is designed for quarter panel replacement.

RickB
04-24-2013, 05:50 PM
Like this:

https://www.lord.com/Products-And-Solutions/Adhesives/Lord-Fusor-Products.xml

bthompson
04-25-2013, 12:21 AM
I'm glad to hear it's working so well! This sounds like the way to go for me too. Time to invest in a handful of cheap vicegrips!

How much JBWeld does it take per arch?

David_Doan
04-25-2013, 06:59 AM
I'm glad to hear it's working so well! This sounds like the way to go for me too. Time to invest in a handful of cheap vicegrips!

How much JBWeld does it take per arch?

I think one of the 10 oz packages would do both.

Trevor Jessie
04-25-2013, 07:43 AM
I certainly have no experience with using JBWeld in such an application, and I commend David for trying it. However, I'd like to see how it holds up under normal use for a year or so before recommending it.