I paid a visit to Zircotec's stand at AutoSport last January and they've explained me that their strengths are on the heritage they have from F1 and Motorsport coatings.
They still do coat for F1 and NASCAR, along with a extensive range of Motorsports team they can't disclose (although their stand was packed with people from teams).
they've told me they apply a plasma-spray ceramic coating, which melts the ceramic cat 10,000°C and then it is projected twice the speed of sound to the metal. When that hot paste reaches the metal, it solidifies and gets the thermal barrier coating benefits. They seemed really professional, they know what they're doing and I felt that might be a good solution.
They've stated their coatings can reduce up to 33% on the surface temperature... which is pretty impressive.
Also, on the same show, saw a lot of FSAE teams that had their coatings.

Don't have the budget (for now) to go on that ride but, soon enough... Who knows?