I have had my TL Type S for 8 weeks and after all of the prep work I have 8 coats of Blackfire. I am going to top it with P21S on a bi-monthly basis. I read where they recommend that GEPC be used before using the P21S wax. Would that be necessary since I have the Blackfire on the car already? I also plan to use the EF QD spray once I get the P21S on the car. I read where Blackfire's QD was not compatible with carnauba. Am I missing anything here? I appreciate any feedback anyone could provide.