Looks like a great product, but I don't believe the product is much different from a two part auto primer?

The cured product has to be sanded and painted, as does primer.

8 ozs. for 20.00 isn't going to go very far. I'm not sure if the weight is high for the covering distance?

Balsa has to be filled somehow, and glassing is an easy way to accomplish this.

I never change a winning game. Polyester laminating resin and glass has "worked well" for me for over 25 years. So has the toilet paper I us with it. Well, the toilet paper has worked well much much longer.

So has auto paint worked well.

I say this repeatedly, some body shops will give this stuff away.

FYI. Spies Hecker, which happens to be my first choice in automotive paint, offers a red brown primer, in aerosol cans. The stuff goes on like the old lacquer primers. The Spies Hecker primer I'm suggesting is also offered in cans. Spies Hecker #3255.