Both rear fenders have cracks from old damage.
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I bought a tube of JB Weld SteelStik (Amazon link), which is steel reinforced epoxy putty. When dried, it is hard enough to drill and tap, so I figured it would work well to reinforce the back side of the fenders, behind the cracks.
I had a can of bean dip from the previous Sunday’s football watching festivities. I cut patches out of the ribbed aluminum can with tin snips, covered them with epoxy putty, and sandwiched them on the back side of the fenders.
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The picture on the left is the driver’s side fender. The crack there is very thin, a clean break, but wraps all the way around the lip. The one on the right is the passenger’s side. The crack there is much worse – not even really a crack. It’s very old damage, below the bumper, with flaps of deeply rusted metal. I bent everything back in shape as well as I could, to get a flat surface for the patch.
After the epoxy set up, the fenders are now solid and the cracks don’t flex. So, that was a success. At least in the short term. We’ll see after some weather cycles if that epoxy holds up.
On that driver’s side fender there were old, bad repairs and it looked nasty. I sanded around the area, then rust treated, primed, and painted.
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