Here's a picture of my tag:
Having a black car I find that after washing it is very difficult to get the water out of all the cracks. Water hides behind the tag and then leaks out later, usually leaving a spotted trail down the rear bumper area. I have found a way to virtually eliminate this and thought others here might be interested.
Older muscle cars like the late 60's early 70's Camaro and Chevelle had the fuel filler hidden behind the license plate. The plate mounted on a spring loaded bracket that allowed the plate to be pulled down for access to the gas cap. I found one of these on a restoration site and ordered it for about $20. I then made a little mounting bracket out of aluminum and bolted the aluminum piece to the spring loaded bracket and to the plate mounting holes on the Corvette bumper. Now I can lift the plate up and wash under it, then dry under it so that water won't leak out later. If you have a license plate frame you can use clear silicone sealant between the license plate and the frame to keep water from leaking out there also.
I hope this helps someone else that is anal about keeping their car looking nice.
3 weeks just like they said.
Florida Vanity Tag
Jim 
Linear Mode
