I worked this product with the PC 7424 on the trunk and rear of my car (Black Mustang GT) for about 30 minutes and follow it with SMR. I park under a light everynight that highlights every imperfection in your paint. That night I found that the trunk and bumper area had about 85% of the swirls totally removed !!! Definitely follow Carguys instructions. I did ...Thanks Carguy !!!
