My car is only 7 months old. When it was 3 days old I clay barred it and used some "Worlds best wax" Now that the weather is warming up here I want to try out the NXT Tech Wax. What should I do to prep it. I have washed my car recently and it looks like the wax that was on there has held up very well against the winter weather. It still feels silky smooth, save for the front bumper. My question is how should I prep this car before using the NXT, can I just wash and use it? Should I re-clay? or should I use some paint cleaner, followed by some polish before I use the NXT. Thanks.