Got all my track layed, and have tested it for several months while I collected all my buildings. Ready to start landscaping. It would seem to me that it would be best to paint my foam surface and apply ground cover BEFORE I ballast the track. It would seem that painting after ballast would get paint on ballast edge, and ground cover foam in the ballast. Since this is the way I have it figured, I am sure that it is wrong for some other obvious reason I am missing!! So, is there a RULE of THUMB as to "Which goes first"?