This etch from 0.15mm brass contains parts to detail two wagons.
The uppermost edge of the rain strip is half etched to help with its location. In addition it also gives a thin appearance which scales out to 6mm full size.
Please download the instructions from this link.
Note that a small number VDA’s are fitted with a rain strip which is full width along the roof of the wagon, details of which are available on the link below.
Please check images of your chosen prototype for suitability.