if it is hard enough for around 40 duro,, i would say blue and topaz and acrosol 1/3 each for trackside, as well as a few coats on monday and a few coats on friday to get in the tire good. btgp always seemed a waste to me on maxxis tires. i have used it on wet tracks with a tire rule on the inside, 3 oz or so rolled for a few days and topped with topaz or blue and topaz with good results.