I'm a big fan of Blackfire Wet Diamond All Finish Paint Protection but have never used any of there other compounds or polishes. Is there SRC compound and polish worth the extra coin or can I get like results with less expensive products? I don't mind spending the money if the product in the end is worth it. I also read that the Blackfire Scratch Resistant Clear line was developed for cars built after 2005 being those cars have a more scratch resistant clear coat than cars built before 2005. Is there any truth to this? If so should I avoid this product being my car is a 2003? Any input would be appreciated.