I would use a 3/16th aluminum rivet with an aluminum washer for good measure. Sikiflex 221 or Vulkem 116 bottom side of rivet head and insert into washer. Add sealant to bottom side of washer and rivet in place. Smear excess sealant over rivet and washer.
Repeat to other holes.
Cheers
Tony
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Per Mare, Per Terram and may all your campaigns be successful.
“It’s a recession when your neighbor loses his job; it’s a depression when you lose your own.” "Harry S Truman"
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