Hi I am making progress, and have had the water tank professionally repaired. Two loose baffles, internal ribbing and leaks all fixed or secured. Is there any recommendations on painting the tank? just black, polished and lacquer, under seal mastic?
I am close to rewiring the car but need to rebuild the horn button. Was this standard on any other more common cars of the era so I can look for new old stock?
Thanks once again
Mark

Here is a photo of the horn button off a 1918 735.