I have never fiberglassed a wing center section and I always thought from reading the forums that you have to use a resin like "West Systems" resin or some other equivalent resin. This is the first time that I have heard using 30 minute regular epoxy. Well that is certainly good news since I always have 30 minute epoxy handy..........and I have yet to buy any finish resin or equivalent. I have done minor repairs to car plastic parts with used airbag cloth and epoxy and it turns out to be very strong. This is very, very good news for me...............the 30 minute epoxy application part.
Thanks
larry