I used a 3-step polish kit from Derby Dust starting with the 'white' polish and then going to a 'yellow-orange' liquid polish before using the supplied graphite. Not sure what is in each medium but we did what we did and it seemed to improve our times from the Pack race.
Actually, if we went by our initial times from the 1st half of the district race some of our times bettered both the 2nd and 3rd place finalists. But near the end is where we started to slow down by just a hair. All the top six cars were running neck and neck with similar times near the end of the race! It was just a flip of a coin who's slowed by that crucial few 1000th's of second to be eliminated.
Earlier, in the finals, our car was running faster than the car that placed 2nd only to slow at the most crucial moments and get eliminated while a few slower cars we'd already beaten a race or so earlier were still in the race - that was a bummer! Kinda wish we'd go by time averages and eliminate the chance events that allow a slower car to keep moving thru the brackets while a faster car is eliminated early because they raced in a tie-breaking events etc.. Kinda makes you scratch your head to figure out who's car sincerely placed where and was the faster car between 3rd and 6th placings? Time or longer racing heats are definately not your friend in PWD Derby racing with
graphite - LOL!