PTFE Paint sealant/polishes

derekbarrier

Wondering if anyone has experience of using any of the PTFE-based polish/sealants on their van paintwork.

How easy were they to apply??   How much did you need fo the average van??   have they stood the test of some time??   Do the typical black marks come off easily??

Typical products are BOORA Permaseal;   X1 eXtreme paint Sealant;   Car Wax Shop Paint Sealant PTFE.

Thanks for any experiences.