On my Texan, in order to keep the raised rivets consistent, I laser cut vinyl rivets which were stuck on the glassed surface. Then I put my drop of glue on the vinyl. The glue will spread out to the edge of the vinyl and no further. Worked good but is more work as you essentially have to rivet the airplane twice. Simple stuck on vinyl rivets painted over do a fair job of simulating flush rivets by the way.