Bravo Zulu to your son for his service! I've been a member of the Coast Guard Auxiliary for several years and while being inland I haven't had much interaction with active duty Coast Guard I've been incredibly impressed by the men and women I have had the privilege of meeting or working with.

The Coast Guard tartan is rather nice, in my opinion. As an Auxiliarist I probably have the option of wearing it, although I'd want some kind of Auxiliary badge as a kilt pin to make it obvious that I'm a civilian and not a member or veteran of our active and reserve Coast Guard. The right to wear anything related to the Coast Guard is a great privilege for Auxiliarists and I'm careful not to do anything that might misrepresent me as something that I'm not.