@arhum1994
Mashallah deep black sea , paint enrich 
just compare these present pics with the pics which u shared first time on this thread
@nomiiii
Nomi bhai try Meguair quick interior detailer, u will amaze with the outcomes
@durrani_45
Biloras wowo meri bilori ka dulha mil gyia mashallah night pics main tu app ka bilora gold plated lag raha hai
@tjkhattak
As usual pure white and very clean, I don't like corolla white shade but don't understand how u make her skin such pure white mashallah very elegant
@venmouskiller
Tare zameen per lagta hai hom made detailer doing well 
@truelover
APp 6 month main aik bar he shakal dikhatay hain u are brand ambassador of silvers
Jazakallah for pm and details
@faisalirshad
Colour fading from back may be
1) That panel re-painted
2) That area mostly exposed to sun
Since car is with u from very first day than most probably 2nd reason I.e that area expose to direct sun and rains, winter mists etc (@quddos bhai and @marwanpasha bhai excellent diagnose)
You need light cut by compound, polishing, than wax coat, good waxes having uv and sun blocks as well as provide protection from acid rains and prevent color fading
Paint correction u can done from any professional and than you can maintain by weekly wash and wax
Further I notice u regularly using formulla polish, polish is not every day product, its lightly eating ur paint clear coat. Polish is once a while thing , in routine should use wax
Clear coat on paint is like a protective shell of paint
And once its finish paint start loosing its beauty
Still u can protect it by light cut , polishing and any good synthetic wax, most economical one is turtle ice polish ( well its name is polish otherwise its don't have any abrasive so its synthetic wax )
@ifahadn
Good for u, ultimate wax provide good protection for longer time
Wax haze time vary with many factors, like how thin application ? If apply thick layer than should remove at ones
Weather, if humid or very cold than should apply panel at a time
This wax is very easy to apply and take off, just apply very thin application on a cold clean surface under shed, now a days good timing for shampoo wash and wax is early morning
If apply under above conditions than U can apply whole car than remove reside
