Open the lid of cosmic and try to smell it. It will smell like kerosene/petrol. It eats the paint, give you just temporary shine, attracts tonnes of dust. Your car will become double dusty quickly after waxing with it. Wears off in just one wash/rain. And oh if you ever, EVER by mistake put cosmic on black vinyl plastics of car it will leave a white mark and will almost never go away.
Theres a reason its only 350 rupees and other top of the line waxes are 3000 rupees+