Scratch-X is not a wipe on - wipe off product, you need to work it into the finish. Use a terry applicator and work a small area, maybe 6" x 6" until the product disappears - you don't need a lot of product, maybe the size of a nickel. Buff the area with a microfiber, inspect, and repeat if needed. You may need to go over the area three or four times, but it will work - don't give up.
I had a dark blue rental car while my car was in the shop and it was seriously swiled. It took about 15 minutes with a PC, polishing pad, and Meg's #9 to get 1/2 the trunk lid (about 18" x 30") swirl free. Don't ask why I was experimenting products and techniques on a rental car I was turning in the next day (my wife is slowly understanding, but I had to promise to not do the hood). Hand swirl removal is a slow go but will be quicker with a PC and even faster with a rotary.