Euroline windows use foil instead of paint. Much more durable, much harder to scratch than any paint. I actually have foiled profile I show to people and give them my car key to try to scratch.
Basically, we have equipment where we laminate acrylic foil, with glue and under the heat.
Never heard about peeling of, even in hot climates.
Regarding fading, everything fades a little bit, doesn't matter how color was applied and to what. But with our foil is extremely minimized.
U-value is .28 with our double pain lwe2 glass. Also, with new Thermo+/ Rehau Geneo profile ( 3 gaskets, first Hybrid Composite material made from uPVC and Fiberglass) U value with double pain glass is .24. This material was used on the first Passive house highrise ever made.
Web site is
www.euroline-windows.com Regards
Mario Holod
425-361-6659