If you are crazy like me and enjoy tig welding:
1-drill out with a step bit so you have perfect round hole
2-gently use a clean & strip disc on a grinder to disappear the paint nearby (clean both sides, wear a mask)
3-punch or hole-saw an aluminum plug to fill the hole. I like 10 guage 5052 for the plug, so i can simply flow it down to the thinner body guage when welding. it also allows the plug to be hammered a little bit thinner/wider if you need to enlarge the plug a bit to fit tightly.
4-clamp copper behind the hole/plug so you can really sink the weld in without worrying about blowing it out. (the weld wont stick to copper))
5-tig weld the perimeter of the plug
6-rough grind with an aluminum grinding disc, finish with a flap disc.
Admittedly I like welding and have the stuff. It produces a perfect result. But it's stupid time-consuming. Takes me a couple of hours to do about 10 holes and that's my limit for a day. So it took me several days to vanish all the MAK armor holes in my 1123