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Re: Cracking fenders
Goach2 #1426802 Thu Oct 14 2021 03:30 AM
Joined: Jan 2016
Posts: 431
G
Goach2 Offline OP
'Bolter


1948 Chevrolet Thriftmaster 3/4 Ton
There are only 10 types of people in this world, those who can read binary and those who can't.
Re: Cracking fenders
Goach2 #1426806 Thu Oct 14 2021 04:04 AM
Joined: May 2015
Posts: 4,297
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Looks good. I had to replace some of those weld-in nuts on the right side inner fender as well.


Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com]
Busting rust since the mid-60's
Re: Cracking fenders
Goach2 #1426823 Thu Oct 14 2021 01:40 PM
Joined: Jan 2016
Posts: 753
D
'Bolter
I have not done it but if you do some research you can find some guidance on duplicating and color matching your new paint to simulate the old patina. You could practice on some scrap until you figure out the best procedure/combination of paints. Fortunately it is a small area and if you take your time it might not even be noticeable to anyone that you had to touch up the patina.


Dave from Northern Kentucky
My 54 3100
Re: Cracking fenders
Goach2 #1426863 Thu Oct 14 2021 06:18 PM
Joined: Jan 2016
Posts: 431
G
Goach2 Offline OP
'Bolter
Thanks Dave, the artistic paint stuff isn't really my thing, but I'm willing to try it. From what I've found, the paint code 830 is 'Commercial Blue'. Wondering where I can get modern codes for it.


1948 Chevrolet Thriftmaster 3/4 Ton
There are only 10 types of people in this world, those who can read binary and those who can't.
Re: Cracking fenders
Goach2 #1426938 Fri Oct 15 2021 03:39 PM
Joined: Jan 2016
Posts: 431
G
Goach2 Offline OP
'Bolter
Can't get to the rear of the fenders as it's two pieces sandwiched:
[img]https://www.stovebolt.com/ubbthread...umber/35921/filename/20211015_091102.jpg[/img]

So from the front:
[img]https://www.stovebolt.com/ubbthread...umber/35922/filename/20211015_091054.jpg[/img][img]https://www.stovebolt.com/ubbthread...umber/35923/filename/20211015_102025.jpg[/img]

Some welds stood tall and were hollow. Not sure what setting is off for that. Got to the other side too:
[img]https://www.stovebolt.com/ubbthread...umber/35924/filename/20211015_110001.jpg[/img][img]https://www.stovebolt.com/ubbthread...umber/35925/filename/20211015_113129.jpg[/img]

I got a PPG code for Mariner Blue, which might be the American equivalent of Commercial Blue. Will see if I can get a small batch whipped up and do a comparison.


1948 Chevrolet Thriftmaster 3/4 Ton
There are only 10 types of people in this world, those who can read binary and those who can't.
Re: Cracking fenders
Goach2 #1426940 Fri Oct 15 2021 04:00 PM
Joined: Jan 2016
Posts: 431
G
Goach2 Offline OP
'Bolter
So, I'd like to start cleaning up inside the fenders, but I'm hesitant to remove them as I've read alignment afterwards is difficult. If I leave the inner fenders attached to the grill/rad bits, does this make it easier to reattach the outer fenders later?


1948 Chevrolet Thriftmaster 3/4 Ton
There are only 10 types of people in this world, those who can read binary and those who can't.
Re: Cracking fenders
Goach2 #1426950 Fri Oct 15 2021 06:27 PM
Joined: Jan 2016
Posts: 431
G
Goach2 Offline OP
'Bolter


1948 Chevrolet Thriftmaster 3/4 Ton
There are only 10 types of people in this world, those who can read binary and those who can't.
Re: Cracking fenders
Goach2 #1426951 Fri Oct 15 2021 06:32 PM
Joined: May 2015
Posts: 4,297
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
On your pics 3 posts ago, those show the mounting flange where the fender proper is lapped over it and spot welded together. Welding those corner cracks isn't an issue as long as you get good penetration. If your welds are hollow, you need to turn up the wire feed a touch. The ones that stand tall, especially if there's a sharp definition to the base metal means that you need more heat. It's a balancing act. If you're concerned about burn thru, you could use a backer made of copper (a piece of old copper pipe flattened and shaped to match the fender works well.) If you use a backer, you need to turn the heat a bit higher, as the backer will soak up some of the heat.

Last edited by klhansen; Fri Oct 15 2021 06:33 PM. Reason: post inserted in between

Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com]
Busting rust since the mid-60's
Re: Cracking fenders
Goach2 #1426961 Fri Oct 15 2021 09:06 PM
Joined: Jan 2016
Posts: 431
G
Goach2 Offline OP
'Bolter
Thanks klhansen, I'm used to the more modern 'thin' panels. It's coming along now, just doing some de-rusting...


1948 Chevrolet Thriftmaster 3/4 Ton
There are only 10 types of people in this world, those who can read binary and those who can't.
Re: Cracking fenders
Goach2 #1426976 Fri Oct 15 2021 11:30 PM
Joined: Oct 2005
Posts: 3,326
"Hey! I sound like Darth Vader!!
I would suggest finding the stressors that caused those cracks and addressing those.

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