Sand and paint. Just like doing body work on a car, or patching
drywall. Fill the hole with the epoxy, Knock off the high spots with
sand paper. then add a bit of autobody glazing putty and feather it,
The holes may have a ridge from the previously installed screws. Sand the
paint surface to rough it up and then just dimple the surface around the
hole so that the hole is depressed below the surface of the door. You can
use a ball peen hammer or a hammer with a punch to depress the surface
around the hole. Then you can use Bondo or use an epoxy filler that you cut
off a roll or ribbon and knead together then fill the hole to the surface.
Any that oozes into the hole will help keep it in place just as plaster
oozing between lath strips keeps it on the wall. I have used this method
when we removed some venetian blinds from a metal door. The patches have
lasted 10 years without any problems.
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