Curious, I am doing some detailing on my Waco. Has anyone ever used automotive body fillers with balsa? Does it work good? Sticks to the balsa well etc? Will it work as an adhesive?

I am making wheel pant pockets if you will. If I spread a thin layer of bondo on the pocket and then push the fiberglass wheel pant into it; will it provide a good strong hold?

Thanx in advance!