Welcome to our Bayou !!
your statement is a little confusing - - -
"they're riveted into the boat and do feel like doing rivet work"
do you mean you don't feel like doing rivet work ?
if you are going to remove anything riveted to an aluminum structure,
you must do something with the holes - - - replace with flat rivets, weld, or nuts n bolts.
I repaired several holes in the bottom of my '59 Crestliner using only aluminum
disks cut out of flashing material or soda cans and epoxy. Make a small dimple with
a ball peen hammer, sand down to bare metal, cut a disk a bit larger than the hole,
and epoxy into place..... sand flush, prime and paint. Eazy Cheezy up n Eazy !!
Some are over 20 years old and are still holding good.
PHOTOS will always get you more accurate information from the gallery.