What is the best way to mark/color the lanes on my track?
Testor’s Paint Markers are probably the best for this. Mark your lane colors in small sections, if you’re into realism. Make small arrows or boxes every so often, like in turns, or places where cars crash a lot. A constant stripe around the track may take away from the realism, if that’s what you’re going for. Paint markers, or pin striping tape works well for complete lane striping. You can build a small jig from a chassis for holding a paint marker. This will give you a nice even line around the track. Paint markers are also very useful for realistic looking track edge marking and caution zones and such. Pin striping tape looks good, but can peel up after a while. There are also pin striping pens available for automotive use. They use small wheels of different widths to lay out paint in a stripe. These can be quite pricey though.