Thanks Rob - yours is an elegant solution ... works exceptionally
well and is straight forward and easy to make.
I have a similar jig I use for weathering tank cars - that involves
using wood verticals and horizontals. The car holders on the
ends are tuna cans filled with foam with the centers of the
foam cut out. This allows me to rotate the car in the holder
while applying the 'drips' that go down and around the car.
Mine works quite well - but is no where near as elegant as
- Jim B.