I currently have a 2 week old layer of JetSeal on my 09 jet black bmw 335. I know Zaino recommends that all prior sealants/waxes must be removed before application of their sealants. What do you guys think? Would I be able to effectively layer Z-5 or Z-2 on top of the Jetseal and have it bond to the jeatseal and paint? or do I have to strip the jetseal completely off? Thanks in advance for your inputs....