Thanks Bish: I came across some pre cut masks after I finished masking.
Thanks Checkmateking.
Thanks Jgeratic: A job well done on your Spitfire, like the clear cement used for the navigation light.
The light at the end of the tunnel is burning brighter and brighter now, yesterday I finished up with masking the windows on the fuselage. By simply laying Tamiya 18mm tape over the window, and using a tooth pick and gently rubbing the tape around the window. By doing this the a outline appears through the tape, then using a new sharp number 11 blade, cut the outline slowly out. Some of the line's that I cut are not 100% straight, but they are close enough.
Before I started masking, using cotton swab's dipped in liquid detergent, I wiped all the surfaces down, mainly to remove sanding dust. Some dust did get inside and can be seen on the windows. Then I used warm water on a swab to wash away the detergent away, then I let the aircraft dry over night before masking.
After masking was finished, I airbrush Model Master acryl white primer #4622, on the top sides. This primer drys so fast that blobs form on the airbrush head, and on the needle. That's what the little dots are that stand out. I plan to use my Polly Scale RLM 65, 70 & 71 for the three main colors.