What do the street racers use on the flat black cars that were so popular a few years back?
Depends on the finish.
Years ago we have a local guy that repainted his car in a very nice and expensive DuPont 2 part matte black finish with no clear needed.
We attempted to wax it for him one evening under the cover of darkness months after the paint job for a weekend car show only to find out the next morning it looked like sh^% and was totally hazed over even when waxed and wiped as usual.
Come to find the finish was not set up for any type of protectant coat.
Had 5 guys take buckets of hot water and Dawn dish detergent to it with sponges and once washed and rinsed, it looked like new as it should have been.
Lesson learned: know what finish you have or are using.
I's say for the box wipe with 3M adhesive remover or isoprop. alchohol if gunky . Then try , as mentioned above, a detailing spray. I like to use Griots Garage detailing spray as i know that it does not remove any wax protectant.
I'm sure windex or any type of plain or foamy glass cleaner will be fine as well.
