It is good to fill the hole. First clean out any caulk, corrosion
, or antiseize, out of the holes. A gun cleaners wire brush, (22 size), is good for this. Wipe out the hole with Iso alcohol. Then mix up some WEST epoxy
with a dolop of white pigment... add enough silica filler to make it hang there, and put it in one of their syringes. Now squirt it around the edges, going around & around to the middle, and make a mound.
After a while it will be "green". This is when it is not liquid, harder than clay, but not totally hard yet. (30 min to 1 hr ??) At this point you take a single
edge razorblade, & slice off the part that stands high. Try not to concave it.
The white epoxy
"dots", will eventually turn yellow from UVs. If you want to touch them up to prevent this, you can avoid the sanding
by using paint
with an artist brush, right after you slice off the excess, for a chemical bond. (I'd use hardware
store, spray can, white appliance epoxy paint
Get the stuff together, then it is a 1 hour job...