If you can t see the hole through the backer you can shine a light directly on the back or from behind the hole and it should help you see better for tracing.
How ti epoxy sheet metal behind rust holes.
Tape when duct tape was invented one of it s nick names became 100 miles per hour tape because pit crews would use it to tape slightly damaged sheet metal on race cars.
After slicing the patches out with a cutoff wheel next came the bending hammer and dolly session until the patches matched the holes and fit snug and flush into the flanged seat.
Body filler is a simple way to repair freshly cleaned holes.
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You can then trace the hole on to the backer with a marker.
Once the damaged metal has been fully exposed you can continue scraping and rough sanding the surrounding metal to an area at least 1 to 2 inched past the weak metal.
If you know how to weld take advantage of your tools for a longer lasting repair.
I then used the templates to trace out the patch panels on some sheet metal.
Coat the area inside the hole thoroughly with miracle paint to prevent further rusting then make a patch of 3 layers of fiberglass mat soaked in miracle paint and apply it over.
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When water contacts bare metal rust forms on the surface of the metal.
Easy to do and really strong.
Whether you re dealing with a small piece of sheet metal or something valuable like a car you can fix it.
This video shows how to repair rust holes in the trunk lid using body solder.
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A rust hole compromises the structural integrity of the metal.
Repairing rust or a rust hole on metal without welding requires a material that bonds and is as strong as metal.
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Epoxy weld is perfect for plugging holes in thin metal and in many instances the results can be a permanent fix to the problem.
Start by drilling a small hole in the center of a backer and lay it over the rust.
This is one way out of many to repair rust holes.