You should only need 2 coats of Poly to fill the weave and then you can put on your rib tapes if you want, then one or two more coats of Poly but slightly thinned with water. It will be tight after you put on the first coat. Use 600 grit to sand the overlapped edges after the first two coats. Don't oversand or you will raise fuzz. On sheeted areas where you want fake metal panels you can put on the high-fill primer and sand.

I do more coats of Polycrylic and use high-fill primer when I finish with glass cloth on WW2 type planes.

Jim