I'm not totally sure I've understood. But I have had some experience with Ninco and "height differences", so to speak.
The idea I had, even if I never realised it, was to quite simply fill depressed areas with paint. Acrylic paint.
Used almost as filler/putty (?) on the whole area, acrylic paint being both more flexible and cheaper.
Depending on level of gloss and added grains (ie sawdust) you can then also get whatever texture you want.
Perhaps this can help?
It wouldn't be as hard on the track pieces as cutting and sawing.
The idea I had, even if I never realised it, was to quite simply fill depressed areas with paint. Acrylic paint.
Used almost as filler/putty (?) on the whole area, acrylic paint being both more flexible and cheaper.
Depending on level of gloss and added grains (ie sawdust) you can then also get whatever texture you want.
Perhaps this can help?
It wouldn't be as hard on the track pieces as cutting and sawing.