`61 Cadillac with original black lacquer paint, 26,000 orig. miles, garage queen. After its annual Springtime major detail with the M7 treatment etc. I topped it with P21, for which I was chastised here. I have since become a believer in Pinnacle Souverain, using it on my other garage queen with great results. Now preparing the `61 for a local show, planning to clean it off with Pinnacle Crystal, and top with a coat or two of the Souverain. My question is whether I should expect any issues with putting the Souverain on top of whatever is left of the P21S after 3 months. The car is garaged, often covered, and never washed with water. Nonetheless, I assume the wax would be pretty thin by this time.