Well, I tired some paint masks, but not the ones I intended. I used the included stickers to use as "reverse" masks on the windows. Then I applied the silver. The silver is one of the new Vallejo metal colors.
When I peeled the stickers up, they left a film behind. So I masked with masking tape, and repainted the windows.
The paint masks were a bust. The paint was too runny. I decided to go back to the stickers that came with. Which look ok. I am going to coat and then try a coating and a wash.