make sure the Rs 2550 thing you see is cavity wax and not rubber coat, the rubber coat is a completely different application.
body cavity wax is literally called cavity wax and the 3M and hammerite product sprays out a yellow or orange colour, the homemade one sprays out a browinsh shade but works super.
Your panel beater is not doing a good job, there is too much filler on the body of the car - apply paint remover and go down to baremetal and then refinish it up.