either use the cf sheet or get it painted form some other painter ,, a paint job should cost by max 500rs if matalic paint,,, those paint cans wont work as its soft paint and doesnt contain hardner it will scratch easily and start to come off in a few days,,, there are painters who charge less i.e got a cultus bumper painted for 1000 rs and a acceptable job,,, considering the area of a lip spoiler it should cost less then 400 ,,