Be sure you don't use aluminum on the headlights! That stuff will just flake off in places since it's just a chrome coating over plastic.
When you lube up the clutches, use graphite or another dry lubricant. The liquids will cause the dust from the belt to build collect and build up around the flyweights.
Those look like pretty nice bikes! I really liked my 70 Rupp, but it was just too small.