I've been Googling this one for a bit and have come up totally empty. Is there any issue with wearing old unit patches on civilian/non-CAP clothing? Patches for units one is no longer a part of, and in some cases not even the current patch design. Along the lines of historical or morale style patches. Obviously not current for a CAP uniform, but can they be used at all on clothing anymore?
No, within the realm of common sense and taste.
I used to have a whole jacket full of them, both CAP and Navy.