Sailplane Finishes

Just wondering about peoples experience with various refinish products
for sailplanes. I am going to refinish parts of my glider over the
next couple of off seasons. Right now I am leaning toward using an
Acrylic Urethane from PPG and a polyester filler. I am familiar with
Simtec Prestec. I have noticed more and more shops and manufacturers
using Urethane products instead of, or on top of, Gelcoat. There are
some reputable people and shops who still use Prestec. I am interested
in comments and experiences with these products from the soaring
community.
With regards to the health issues, I have access to a professional
booth and wear the full suit and mask with fresh air. Thanks for any
input.
R4