Recently got a car painted and posting some information that wasn't available here for Islamabad/Pindi that some users may find helpful.
You can buy Sikkens from Adnan Paint Gawalmandi or Muslim Paint Mart Gawalmandi
You can buy Nexa from Adnan Paint or Al Razzaqia Paints.
You can buy Axalta Challenger from Muslim Paint G-7
No clue about DuPont and Glasurit. If some members have any info on where to procure this stuff, please do share.
The Clearcoat being sold of sikkens right now is AutoClear Pro Xpress and it uses a ratio of 3:1 or 4:1. Make sure to read the TDS of whatever you buy. The paint shops will suggest you to use a 2:1 ratio which was true for AutoClear. READ THE TDS.
Sikkens primer is not available in the market at the moment and Nexa P565-888 is perfectly ok to use under sikkens. Another member has done the same thing in one of his projects @/arkhitect