I already use some of the latest SiO2 sealants on my car and am purchasing a new car that i plan to have PPF applied from new. Can i still apply these new sealants (eg, Gyeon MOHS, or Gtecnique EXO), on top of the latest PPF, and if so, would it still chemically bond with the PPF and hence add its sealing properties, or is it a waste of time applying?