What did you do to your trains today?

[Super]

After your post I watched several videos of actually spray painting whole cars....wow it has to have good adhesion and stretching just because of the expanding and contraction on a car due to sun and cold. These products look to be readily available here at all the auto parts stores. Only thing that concerns me is thickness. Will it be too much for the track couplings and will it fill in the shallow traction grooves on the rails.