I was having the same problem with wrinkles..
I found it easiest for me to lay the fiberglass down first and smooth it out.
Next i pore some Z-Poxy on it
Then i use a squeegee and lightly pull the resen over the cloth from the CENTER out
After i have it almost all covered then i go back and start really pulling the resen out to the edges.
Always work from the center out. Dont try squeegeeing it from the edge inward or wrinkles always form.
That was the easiest way i found anyway. YMMV.
Now that i have actually glassed my first plane(TFGS P-47) Im going back to moneykote. MUCH easier,quicker and less work for me.
Pat