dear faizan bhai
allways pleasure to meet u bhai, in first sight i though its faizan's younger brother ( you seems lost ur weight )
frankly speaking for dark and bright colours i dont like synthetic waxes
u already have protection in base (wg ) so now u need beauty and beauty comes by natural waxes
my suggestion is first apply gc and after curing time apply #26 
recently i did this combo on my city and results were chumable :*
come my place some time i have one magic wax for ur blue bird ( poorboys natty blue a really colour darkning formulla, buhat se acchi acchi waxes ko bhool jao ge app :)) frist try and if u like results than can get from uk its just us$22 in usa , not sure its price in uk
i also heard very good reviews about collinite marque d elegance wax its having high concentration of carnauba so gives high depth to paint and long lasting protection in usa its us$32