it was a "tufted" mat,,,,,I don't remember if fibreglass or canvas,,,,,I only remember the pulled in areas like Gramma's quilting with yarn
some kits call for those to be a gray color,,,,,and I would bet that some were the gray and some the "sail color",,,,,,and maybe another variation I don't know of,,,,,,,,canvas can be had in any color you want
it is funny, in a way,,,,,,,,Sail Color is an old Fujimi and Hasegawa color call out,,,,,,and Gunze has added Radome Tan to there paint line,,,,somewhere in the numbers up above H-300,,,,,so some kits call for Sail in one spot and Radome in another, on the same instruction sheet
well, I am doing it again, typing about models instead of working on a model,,,,,I only have 3 on the bench right now, which is cool for me,,,,,,,,,,usually there are more boxes "in action" stacked up over there,,,,,,,and 1 model is a "repair",,,,I don't think that counts as a model in "production" status, lol
take care, I will get a Phantom out soon and join in here
Rex