It´s easy, use a black sand paper , and them paint the traffic stripes (road stripes?? I don´t know wich the correct…sorry) with an airbrush…
Don’t worry too much Fabio…! I’m sure everyone understood that you meant road markings. Your English is very good. Wish I could speak Portuguese as well as you speak English.
Another technique is roofing felt (Tar Paper or roofing paper). It has the correct color and just paint the stripes on it. It can also be used for runways. You can get scraps at any construction site.
Thank´s Djmodels…
Berny13…it´s a good idea, I try to find it here in Brazil…thank´s