I posted this once before a couple years ago, but I went to Graphtech Graphics in Daly City and had them cut 1" blue dots. I then painted the sheets with spray paint that I bought online with the same color code as WRB that I had from painting my skirts.

Here's some pics of it after install. Still looks pretty good after a couple years. I had to replace a couple because the outline of the hole would start to show on the vinyl. If you spray a whole sheet, you should have more than enough dots for future replacement. FYI, my car's been through rain and snow.