Wasalam and welcome in world of eddiction 
One this is confirmed that ur rides are dandraf free now
Blacks most difficult to maintain ( personal excperince ) further darker colours are realitivly softer in nature compare to lighter dyes so dark paints get swirls and light scratches easier than light paint dyes
Yes paint sealants resist to minor scratches and swirls and provide better protection than normal finishing waxes or u can say beauty waaxes
So pinnacle souvern wax also falls is finishing wax , provide good beauty but this beauty don't last longer
In my view u should get treated ur rides from any professional like paint correction or in simple words light cut, polish, sealant protected and than u just maintain that treated skin with proper wash and wax tech 