Prepping the body for paint (yes while the panels are on it)

Ok so since I had the assembly connected, glued etc... I started to wipe down and tape off the body circle panels to be ready for primer and white painting.

Nice, clean and ready... I think... the question is, is it round enough?  I don't think so.

Took some painters tape and began taping around the circle edges while using paper to shield off the inside of the circle.

Another shot of this work...

Here I am taping slowly around the circle edges... I will have to paint those circles after we complete this or leave it for weathering effect, shall see.