RE: Oil Poly. vs Water Poly. vs Finishing Resin
I started using the water-based Polycrylic about 5-6 yrs ago. I use it over .6 oz. cloth and I only use two coats so I'm not filling the weave with the Poly-C. I have noticed that it toughens up after several months. However, I agree with Campy. The purpose of the glassed finish is to establish a paintable surface, not to make it durable. I use it because its lighter since I stay to models in the 60-80"span. Being easier is a bonus (and a pretty significant one). There's no going back to resins or epoxies for me, except for forming parts.