Calling it GrandPirx -- wrong
This is a temporary cout as you can see. Greenset MTC will use Greenset GrandPrix acrylic as top coatings over thier Mobile Tournament Court boards , but its erroneous to call it Grand Prix. Only the permanent Greenset courts are Grand Prix.
Also, if you look at this gallery , it looks like a PVC Carpet , not boards being painted over. In fact, no where in the Gallery do you see the paint being applied.
There have been some innovations lately with a much slower type of PVC foam used for a new brand of carpets , like the new one used this year at WTA Quebec City. Greenset , not surprisingly , may already be on board with this.
If this really is Carpet and it plays this slow - then we may be seeing a lot more of this in the near future as Carpet is a lot easier to install than paint surfaces - even boards.