Where the steel hanger strap rubbed on the gas tank of an old car I had. I used 2-part epoxy-type gas tank repair to seal the hole, let it harden then replaced the hanger strap. It never again leaked while I owned that car.
These epoxy gas tank repair kits can be applied wet, at least the one I used said that, and sealed.
For a large hole a screwdriver would make, I think I'd clean the area, then use a short SST sheet metal screw into the hole after I'd covered it with epoxy. Then cover the SST screw with the same epoxy. IMO the screw head would give support to the cured epoxy in the hole
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2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member,FMCA. "We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert the Constitution." Abraham Lincoln
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