I have been and currently use Zaino Tire Shine.I'll have to give that tire clearcoat a try. I also like a nice matte finish on the tires. I've always used Poorboys Bold N Bright Gel and it works pretty much the same. With a light coat it gives a nice matte finish that survives several washes and it doesn't sling at all.
Stuff works killer with no sling, but am open to new and great products, especially if they work as advertised.