Fouad bhai don't make me embarrass ,no one is guru or expert in this life, we all learn from our experiments. How u treated wheel wells is good learning for me and sure will try to follow same Inshallah 
Soon Launching very first in Pakaistan 100 % Inorganic glass coating with active ingredients of Sio2 over 85% , once i get kits will inform u , infect will come Islamabad and have joint session with u on any of ur client car Inshallah 