I seem to recall a couple of pictures posted on the forum of gentlemen wearing a belt over a waistcoat. I like the look of the belt with the kilt, but I like the waistcoats too.

As for the braces, I have several pair, just can't figure out how to work the buttons with the overlapping aprons. I would think whichever apron I attached them to would be pulled up. It would seem they need to be attached to both aprons but that seems difficult to acheive.