[stevehecht]

Originally Posted by Steve33

If you want to get rid of the self-healing properties of the film, go ahead and go for it.

"Will Opticoat or cQuartz hurt the film?"

Sealants such as Opticoat and cQuartz will not hurt the film or interfere with our Ultimate paint protection film's self healing properties.

"Can/should Opticoat or cQuartz be applied to the car before the film is installed?"

We do NOT recommend applying sealants such as Opticoat or cQuartz to the parts of the car that will be covered with film. The low surface energy of paint sealant products such as these will cause adhesion problems both during installation and over the life of the product. In addition, it is worth noting that there is really no benefit to applying sealant to the paint before the film anyway, since the film will provide far more environmental protection to the paint than a sealant ever could.

http://xpel.com/support/installation/faq.asp