Update: No organized racing yet, but having a great time with friends! Some pics...
With no glue, no tire goop, and fish tires only, track maintenance is easy. Here's the TracTractor in action, it's a Parma inline chassis driven by a Strombecker Devastator through double gear reduction. A few laps dragging a damp microfiber towel picks up all dust and we're ready to go.
Part of the ever-growing stable of cars. 36D sidewinders cover the 76ft lap in 4.5 sec, Parma 4½" stockers do it in 3.7, X-12 powered wings take about 2.85. Track record is 2.670 with a Gp20, but X-12 is really the most power that is practical with these tires.
All lined up for a race, it does get rather interesting with these cars! Track surface has acquired a good coat of rubber and traction is excellent.