The pictures that you posted look fantastic. The racer turned out great. Maybe it's me, but I prefer to use old school enamel paints. I had a problem before with acrylic paint lifting after I masked something off. It very well could have been something I did incorrectly but every since that happened, I have been a little gun shy when using them.
I do use them on occasion however. I just try not to use masking tape when I'm using acrylics.
Building up a 109 huh ?
Sounds like a great idea ...
I'll be looking forward to seeing it. One can never have too many 109's.