In preparation for painting a 1/16 rc tank, I might build a 1/35 fine scale kit first to work out paint color and to practise different camo patterns. In the past I used to build them just for fun, but I noticed the kits kept getting smaller and smaller as my eyes got older.
Designed to fight off USA & British fighter bombers, the Kugelblitz flak panzer was a very good system, though it never made it much past the prototype stage of development. After the war it was the inspiration for the M24 Duster.