Interesting discussion of ceramic coating layering, waxing etc...
Layering Coatings, Sealants & Waxes: Why? Why Not? - DETALKS
https://www.youtube.com/watch?v=V3a9CrCQZ8k
Personally I bought 5 bottles of Mr Fix 9H
Official Video - 9H Mr Fix Car Nano Ceramic Coating How to Use
https://www.youtube.com/watch?v=PD4AFv774cc

Prep the vehicle - Wash, detox the paint, cut and polish as necessary, mask off vulnerable parts

Mist the car with a water sprayer,
Apply 4-5 drops to the cloth
Wipe onto the vehicle in a left to right and top to bottom motion (i.e. not circles) on an area of about 40cm x 40cm
Apply 1-2 drops (top up) to cloth and continue with rest of panel/vehicle, repeat topping up liquid onto the cloth as you go.

After the appropriate time has passed - summer 5 mins, winter 5-10 mins, wipe off with a damp microfibre without exerting too much force/pressure.

After wiping with the damp microfibre, wipe again with a dry microfibre to achieve an even coating and good lustre. Use a circular motion but the last wipe should go in the direction of future water flow ( i.e. the direction the water would run off the panel).