Why building a layout takes so long (part 2)

I'm up to the last bridges for the outer loop. I've got the bridge pier installed and painted a useable color. I'm about to tack down the bridges when I realize that;

a.) the streambed still is not sealed and painted.
b.) One of the bridges is not yet painted (still in its original plastic glossy black finish)
c.) its too cold and windy to spray paint outside.

so....put the outer loop project on hold for a day or two and move on to laying roadbed for the inner loop!