MX-774 Kitbash Masking Part 16

This is a tough mask. Roll patterns are never easy, this one had it's own challenges.

I wanted to be sure the horizontal mask lines were at 90 degrees to the line of the body tube.
I cut some cardstock at 90 degree angles and measured from the tip of the leading edge to the outside end of that edge. It was close to 1 1/2" long.

I taped it to the fin making sure the edge against the body tube was straight and flush. The side of the cardstock to the right in the picture would be the guideline for the tape mask. In the picture you can see the Scotch tape set next to the right side of the guide.

When rotating the body a quarter turn the next black mask is on the lower third of the fins.
I make another 90 degree cardstock piece for a tape guide.

To be sure it was set to 90 degrees, I used another cardstock square.
I layed it down the fin root edge against the rear guide. When it butted against the upper guide piece, the lower piece was taped from behind.
Scotch tape was set with the edge right right above to the lower square.
Both guideline cardstock squares were removed after the tape was in place.