I don't know any brass treadplate for ALCos, however Archer Fine Transfers makes 3-D decals with raised treadplate pattern, you put them on just like regular decals and paint, very easy. You can put them straight on the plastic body, but I like to use a gray primer when I'm working on a black body so I can see what I'm doing and then paint as usual.
http://www.archertransfers.com/SurfaceDetailsMain.html
Jay
C-415 Build: https://imageshack.com/a/tShC/1
Other builds: https://imageshack.com/my/albums
HI,
who makes correct brass safety treads for running board for Alco diesel engine RS18 in HO?
Thanks for answer me!