Masking the Roundel.....

First I printed a full size template on the computer. Due to the size this was on two pages. I joined the pages with tape and cut out the roundel. I also removed the star and bar from the middle. With the paper template I placed it on the wing and traced around the circle part. I then marked the corners of the blue. After I had the circle part and the corners marked I used 3M fine line tape to go around the design. After masking the blue portion I painted the insignia blue. Once that was dry I pulled the tape and masked the star and bar, again, using the paper template and a pencil to make alignment marks onto the wing. Then the white was masked and painted.

Hope this helps...

FYI - I was going to use "Frisket Film" cut onto a template for the design but found the combination of low tack and resistance to curving over the wing to prohibit the use of frisket.

Photo of Roundel Below...

SunDevilPilot