>>5920279It's not necessary, but helps in a couple of spots (like Materia's toes and to glue to the ball a little further up in the joint torso to prevent her from separating)
But really, that gunpla guide helped so much when building mine. Don't be a pussy and read it, because it answers 99% of questions people ask. It even shows what each symbol means in the instructions you will see for the kit. You don't have to know moon runes to do it.
