It was cut from an Evergreen styrene sheet. As for paint, I used Polly Scale reefer white and just mixed flat black in until it seemed right. I also used a small brush to create that streaky effect with some darker paint.
I like your work, dude! Your roadwork has given me ideas for my own. I haven't been able to decide on how to do mine, & it's been holding up a big section of my layout (well, relatively big...). My first comment on "Trainboard", even though I joined a year ago...apparently! Munch