😃 Just FYI, for others interested in trying spraying it, it's probably best to wear protective gear - I wore a simple mouth & nose mask designed for "nuisance" levels of mists & dust, and goggles. (I don't know for certain whether that's sufficient - I took a guess) The goggles also helped to create a better seal for the mask. I've seen videos of home hobbyists using an airbrush to Pai scale models - they sometimes cover their whole body - including a "sock" for their head. Needless to say, I did not do the actual spraying in my living room. If the tyres are on the car, I would probably protect the entire car, due to the mist.
One of the tyres has some excess in the ridges, and it's white, which looks unsightly. I had this problem when applying by hand as well. Will upload a pic. This may be one reason why the advice is to apply thinly.